Sydney is correct, afternoon naps give WILDs just as easily as the more traditional time in the early morning.
^I'm glad you're going to try a WILD without pain. You really shouldn't ever be in pain. I know some people might say that pain is a good anchor, but frankly that's kinda stupid. And even if we ignore the stupidity of trying to fall asleep in pain, it's a crutch. You shouldn't have any crutches. But whatever, I've said my piece.