I am going on the Deso Gray first of April - a 5 night raft trip (flat water) with our baby boy who will be 8.5 months. His first raft trip! Does anyone have any suggestions on what I can bring for him to sleep & nap in?

He is too big for those travel bassinettes and of course a pack-n-play is way to huge. Although great for rock climbing, a baby tent wouldn't work since I want it to go inside our tent.  I was thinking an inflatable travel bed that has those little bumbers. One small enough that we can also lay on the raft for him to sleep (under our umbrella and with supervision of course). Does anyone have any experience or feedback?  Something they use for baby to sleep in while backpacking?