I am still researching he options, but I tend to agree with @Corey_Leamon on their approach. If you consider why you like using an RV rather than, say tent camping, it is likely the convenience of "ready to go". We bought our RV for the simple reason that we love the idea of "add food and clothes and go", I don't have to spend 4 hours collecting all of the things we need and packing them into the car...everything is already there. An RV for all sense and purpose is a home on wheels and most people expect to have some of the same features they would get when renting a hotel room, or a vacation rental home. They aren't expected to bring their own pots, pans, and dishes.
The other aspect is the impact to the owner, are you going to unpack/remove all of the items that they don't pay for and then put them back in if they do agree to pay extra for them? That seems like a lot of hassle to me. Some things are really in your interest to provide (e.g. toilet paper) as the alternative can get messy (literally) and expensive.
Personally, as a renter if I saw the list of items that I would have to pay extra for I would likely skip your listing and move on to another one. Now if you listed all of those items as included (and a reasonable cleaning fee, including linens) then it makes the listing more appealing.
That is my take on it anyway, we are still researching before listing. At this point I am waiting to find positive feedback on any actual significant insurance claims for damage by the renter, and so far I've only found more negative experiences (obviously those that get burned are likely to speak loudest, however the entire financial advantage of this platform could evaporate in a single rental).