Sleeping with or without a tam?

First of all, hi everyone! Im glad I found something as good as a crochet recovery group :D

I had my dreads crocheted 2 weeks ago, never did any maintenance tho. Now in recovery process.

Thing is, I have been using a woolen hat to sleep, as everyone recommends to. But yesterday I just fell asleep and forgot to put it on. Next morning I found lots of hair that had "came out" of the crocheted dreads, seems like sleeping without the hat set them free somehow (im guessing from moving my head at night plus the friction on the pillow). So... maybe sleeping "bareheaded" is better for us crochet recovering folks? Any clues?