My Ds has always gone to sleep with us right there, so no problem getting him to sleep with us in the room (if we weren't in the room, there would be a problem!) He sleeps in the bed with my DH and I sleep in... his room! So at WDW he sleeps with his dad and I get my own bed. It's not a big deal. When we get back from the parks we ALL get into bed. Our first time I thought DH and I would stay up after DS went to sleep and watch fireworks from our balcony.... I couldn't make it past 8:30!!!!
On vacation, you will have to make exceptions. They will be wiped out anyway!!!!! A warm bath, lights out , mama's arms and some familiar lullaby music should do it!