That was the hardest part for us last week with our son...getting him to go to sleep. We had been putting him in our room at home in the play pen to get him used to sleeping in the same room as us. However, we should have all gone to bed at the same time to remedy the getting him to sleep with us in the room.
With our son, he wouldn't sleep more than a couple hours at a time in the pack and play last week, so, he slept with my parents a few nights. Then we ended up moving the ottoman into their room (we had a suite at the ASMu) and setting that up for my sister. My husband slept on the pull out arm chair, and my son and I slept on the pull out sofa sleeper. Our son got a good nights sleep this way, but none of us really got a good nights sleep.
You may just have to see what happens the first night or two and adjust your plans accordingly. Next time we all go as a family again (there were 5 adults and our son), we'll get adjoining rooms so we all have a somewhat comfy bed (those sleepers were horrible), and just know that our son will have to sleep with either myself or my husband.