@Michael8116 Here we go.....with regard to your camper, I don't think you're allowed to list on AirBnB. I'm pretty sure that any camper/RV listing has to be stationary. There are so many liability and other issues with you attempting to rent your camper to someone that has to drive it, hook it up, etc. You should really check with the AirBnB rules to see if you are breaking them. I can only imagine how messy that could get if somebody actually rented it, had an accident, got injured, etc. I would proceed with extreme caution. (Actually, I wouldn't proceed)
As to your loft space...there is a way to do what you're trying to do. You make two separate listings, one for the bedroom and one for the whole place. You have to link the calendars so you won't get double-booked.
You should also correct in your description that you've said the guest is renting the entire downstairs space, but sharing it as well. They are renting a room and private bathroom, and the rest is shared space. You will find with guests that you have to be crystal clear, or they have grounds to complain to AirBnB and seek a refund, which they WILL do.
That being said, I think it's highly likely that you will somehow run afoul of the AirBnB party ban with this loft space. You should remove the word "parties" from your description of the theatre room. It seems like you're more interested in renting this space for creating content, but partiers are going to jump all over this space, and there are likely more appropriate places for you to advertise it as commercial space. I do realize that you've said you'll be at the location, but "almost anything can be negotiated" will lead to problems.
I realize that you're a creative person and content creator, but I think your pictures could definitely use improvement. I don't get a sense of the entire place or how it flows.
This is meant to be helpful, and I hope you'll receive it as that. Good luck.