Screw WILDing. If it's that much of a hassle, just lay in bed and say "I'm going to dream, and I honestly don't care if I feel sleep paralysis or not."

Here's a hint: the stuff people say about moving is bogus. Suffering through a cramped muscle is counter-productive, as is focusing on the chant "don't swallow." Move around until you don't really give thought about the position you are in. That is where true comfort (and successful WILDing) is.