Would like to be a courier So Cal to New England this spring

Hello! I am new to the forum but have been reading several of them. I'd like to be a courier for an RV (preferably Class C) this spring to move from southern California to just south of Boston. I have an elderly cat with bone spurs and arthritis, so she can't be jammed in a carrier for other moving options. (Also, an RV sounds fun.)
I've gathered from other forums that southern California RV's are often better deals than New England- based vehicles because of the rust issue. I've seen posters advising to buy in CA and re-sell in New England, but I don't have the spare money to take that chance, and I definitely don't have the gas money for the trip if I did a rental, as I imagine gas alone must be about 3k!
I was thinking I could call Boston area RV dealers and see if they had an interest in me acting as a courier in exchange for the gas cost. I also thought about maybe posting on Craigslist, I'm just concerned I might get some sketchy replies or scammers. I checked uship dot com (apparently they are on "Shipping Wars," but I haven't seen it!) but I'm not seeing any Rv listings, and a forum message seemed to indicate the site is lacking in RV listing options.
Any advice is appreciated-- where/whom to ask or post, and if this is even a reasonable request!

Thanks :)