My DD's daycare would not allow blankets, but they would allow the halo sleeper.. this however does not keep their hands out of their face when sleeping.. I konw that centers also do not allow the babies to sleep on their stomachs either.. backs only.. my dd's daycare had turned her over 2 times while she was sleeping after she rolled over..
If your son does wake up at daycare after being asleep for a while that will be there responsiblity to either get him back to sleep or play with him while he is awake..
I'm sure he will be fine, and will make the adjustment fine.. Trust me it is MUCH harder on mom then it is on the baby!! I went through it with my DD two years ago and cried every day for a week..
-Beth
Mommy to Ella 5/27/05 and Katie 4/11/07