Here is a thread discussing chucking.
https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/22609074/srt/pa/pging/1/page/1.cfm
You may or may not need a slider depending on the 5th wheel that you buy. I bought a used slider before I bought my truck or camper and so far I haven't needed it because the front corners of my camper are not square and I've made some pretty tight backups. I still don't mind having it just in case I get in a really tight space and need it. It also depends on where your pinbox is mounted.
Sounds like you'd be happier with a bunkhouse but keep in mind that you lose some open room. It's just a matter of if it's enough room for you. When looking just spend a little time in it with the people you'll be camping with and move around like you would when camping. When I was looking there seemed to be more bunkhouses in my price range so that may be a plus for you.
