Hi Chicks and welcome to the forum!
I don't have any experience with 3rd party extended warranties but many of our members here do and I hope some of they weigh on on their experiences.
Over the years, from what I have read, many of these extended warranties are so exclusionary that buyers are a bit dismayed when they try to claim against them. Then on the other hand, I've read stories over the years of a couple of plans that cover a lot of items on an RV. Wishing you the best in your search and whatever you arrive at, be certain that you are crystal clear on the exclusions and that you're okay with it not covering those items/areas.