My friend and two of my friend's friends are going camping.  They usually rent an RV but can't afford one this year so they're driving and bringing tents.  They have invited me.

I'm totally down to go, but I really want to rent an RV (which I can afford, but it would be a splurge) because there's no way I'll be able to comfortably sleep in a tent and I hate sharing public showers. I have a bad back and difficulty adjusting to unfamiliar sounds at night so a white noise machine in an RV is a must. I also can't fall asleep in the same room as anyone I'm not close to, and I'm not close to this group but they are truly lovely people.

AITA if I don't offer to share the RV with them, even if it's big enough to?  They are lovely people but they are slobs about their living environment and I don't want them making the RV gross (tracking mud/sand/whatever in etc) or costing me a deposit.  Should I just skip this trip?  I'm imagining possibly being hit up for refrigerator space, showers, and sleeping spots (especially if it's a bigger/nicer RV and/or if the weather goes south) and I'm just super uncomfortable with the idea.  