Terry, just a thought but why don't you get a dealer take my keys off me price now, so you know what you'll be dealing with roughly, anything you can get over and above that on a private sale will be a bonus or at least let you see what the worst scenario is.
I'd then take the time daily to upload it to places like Craigs List, all RV Forum websites (most of them have a rigs for sale thread/section), also auto trader and any other number of places where there is an RV's for sale section.
Yes the above my be a lot of work in the interim but it'd be worth it if you kept an extra 10, 20 or 30% sale price in your pocket. I know how pain in the rear uploading to free websites can be to keep it on the front page by deleting and reposting with pictures every day sometimes twice a day even approaching weekends when most folks are looking. Believe me it's worth it though to keep it on the front page. That's how we rent out our properties and daughters rooming house at Uni using freebie ad sites.
Have you considered putting it with a busy RV consignment location - RV's are the types of things folks like to see, touch, feel, experience so if you put plastic down to protect floors and seat coverings maybe that's another option?
Just a few ideas FWIW and I'm sure others that buy and sell RVs more consistently might have some other ideas so you don't have to let it go bargain basement price.