Thanks all for the input.
I suppose I'm what I'd admit to as stubbornly old-school. Unlike what Holl_ands stated his preferences are in a linked article, I don't mind static (reminds me of "FM" from Steely Dan "No static at all"), or more accurately, bad audio.
I grew up carrying my mid-70s KMart radio everywhere with me. Could pick up AM stations from Mexico at night. English-speaking, high-powered rock stations (except for the call letters being in Spanish). Listened to Casey Kasem's AT40 religiously. All with my shoe-box sized transistor radio. I found the exact radio a few years ago on Etsy. AM/FM/VHF-Hi/Air radio made in Hong Kong. Works like new.
So, with my slide-in truck camper, I can put a car radio in the mounting location, some speakers, and mount the standard RV whip antenna on my rubber-coated roof, just like the option from the factory. I'm sure it'd get almost as good reception as the factory radio in the cab of my truck. And maybe that's what I'll end up doing. But boondocking somewhere, I think it'd be cool to search for all those distant stations. A few months ago, on a hilltop, me and my little KMart radio picked up a fading Denver AM classic adult contemporary, from 600 miles away. Of course, I had to be on the roof of my camper, since the exterior is clad in aluminum.
Car-type radios I've been looking at are (so far) either in the Jensen line (RV, Heavy Duty or Marine versions with NOAA weather band) or the Panasonic (PanaPacific) commercial truck line (also with NOAA weather band). The bluetooth recommendation is noted. Besides the factory AM/FM/CD in my '07 F250, I've got a Kenwood TM-281 VHF 2-way in the truck cab (receives NOAA), as well as a CB with weather band, so, I'm obviously covered there, so weather band in the camper isn't a necessity, but it'd be convenient (I like having NOAA for the places there's no cell reception); otherwise, I'd definitely consider like Sony, Pioneer, JVC, Kenwood, etc. (too bad Marantz isn't still making car radios).
The radios I was alternatively looking at are DSP receivers, but have analog-style tuning mechanisms, more like my old transistor radio, which, in my mind, is like I used to use, turning the dial slowly, trying to see what it picks up.
One thing I factor into whatever antenna(s) I put on my camper, is the ability to use it not only in developed camp sites, but also when camping in truck stops, Walmart, or stealth camping, and wanting to have good reception without looking like I'm "set up."
For the FM antenna, I could just mount a vertical whip on my Winegard Sensar TV antenna, so that when the Sensar is cranked up into position, I can use one of its support legs as one element of a vertical FM dipole, and the whip as the other element. Of course it'd be vertically polarized, so no directional gain, but I think I can live with that, thinking it'd be worth the sacrifice to be able to constantly rescan the FM band. Otherwise, even with the Sensar down and stowed, I'll still have one vertical element for okay FM reception.
I ended up putting just a vertical dipole on the roof of my house. I'd looked at the Stellar, among others, but just made my own vertically-polarized dipole cut to the FM broadcast band, as I had lots of parts from extra TV OTA antennas with VHF-Low that I could cut, plus, I already had a perfect horizontal standoff about 4 feet below my main TV antenna to mount the FM vertical dipole.
The AM antenna is a different matter. My little KMart radio doesn't have any external antenna inputs. I could make ones, 75ohm for FM and 300ohm for AM, like referenced in one of the articles linked by Holl_ands, and I may end up doing that, as I've read the old transistor radios have superior sensitivity/selectivity compared to the DSP units. Not sure if that's altogether true, though. And, I just don't know if I can do that to a relic of my younger days without regretting it.
The car units seem to do a decent job of tuning AM with an FM-band whip, and I'm assuming the circuitry has accommodations to allow it; but, the alternate radios I'm looking at have external inputs for both:
But, the Pixel antenna is something I'm not familiar with, as far as how well the AM component will work, since it appear to be about a 300" length of wire wrapped around the FM whip, and separated by band into 75ohm and 300ohm outputs for the radio:
I've never used an external loop or long wire antenna on an AM receiver that also has an internal ferrite bar antenna, but I do have experience with car radios and how well they seem to pick up AM broadcast, so, I suppose that's where I'm in unknown territory, deciding between the two.
FWIW, I don't have satellite radio or TV, and don't have any amplified OTA TV systems in my house or my camper. It's all unamplified by design. I even bought a residential, non-amplified Winegard Sensar TV antenna head for my camper, and bypassed the signal amplifier/12v circuitry inside to a straight 75ohm coax direct to the TV from the antenna. I just prefer it that way... for now!