As a general rule, it isn't a good idea to plug subwoofers into power strips. The recommendation is usually to plug them straight into wall outlets.
The best way to do a sub crawl is to put the sub at your listening position (on the bed where your head would be, in this case) play something with strong and steady bass content, and then move around the room with your head or your SPL meter at subwoofer height, when the sub is sitting on the floor. (That's the crawl part.) You are listening/measuring for the location in the room where the bass is the strongest. The sub is where your ears would be, and your head or your SPL meter is where the sub would be. And, the height matters!
If there isn't any
location in the room where the sub sounds stronger than any others, which is fairly unlikely, that means that the listening position itself is in a large null. In that case, your best bet would be to pull the bed out from the wall a little, or try the other side of the bed, if its a queen bed, or to use dual subwoofers in an effort to eliminate the null.
You have to physically move a subwoofer out of a null, or modify the null with a second subwoofer, and you have to physically move a listening position out of a null. The listening position is harder to modify with the addition of a second subwoofer. The good news is that even moving a listening position by a foot or so may sometimes help.
But, be systematic! You can't do just one thing right. You need to do everything right, starting with plugging the sub into wall outlets, with longer cords if necessary, and continuing with a sub crawl. Then, once you have found the best possible location for the sub, you can calibrate it and proceed from there. And, those steps have to be performed systematically as well.
Sometimes people get lucky. They put their sub somewhere, plug it in, and it sounds great. Sometimes, people have difficult rooms that require more effort. In that case, being diligent in your approach is your best bet. You can also continue to talk with SVS. Having someone stay on the line to talk you through each step may help.
Posting every few minutes, on the other hand, will get you a lot of random advice, but may not actually move you much closer to a solution. Hang in there! Technology is frustrating for every single one of us at times. Ask me how I know!