S.C.
Pass the baby is inevitable. If you stress out about it, you'll only make yourself crazy. He'll be fine. I'm betting that he won't even care too much who's holding him. When you feel the need for quiet time, just take him into another room. I'm sure people will understand. As far as packing, I always pack way too much! I can't help it! I just want to make sure that I have everything. However, I'm sure if your sisters have children, they probably have things you can borrow. We always take the pack and play when we're going overnight. It's wonderful for naps and nighttime. Have fun!