...for the first time!

DH and I are getting a hotel room (locally) and leaving our girls overnight for the first time! It's our 5 year wedding anniversary. I'm really excited but also a tad nervous.

BIL and his gf will be picking the girls up from daycare tomorrow. We'll be leaving their car seats at daycare after dropping them off. They'll be staying at our house and we'll be back late Saturday afternoon.
They're stopping by tonight for a bit so I can give them instructions, talk about the girls schedules and such. My 3 year old is easy. The baby is 11m and I'll be leaving bottles labeled for when to give to her. Her bedtime routine , god help them. And foods we haven't tried yet. pediatrician and pediatric urgent care information; just in case.

Anything else that might be helpful for them?