From my experience in the last few years RV financing is a bad deal compared to other money. And by other money I mean home equity lines of credit or just moving money around between teaser rates on credit cards.
About 3 years ago when I bought my TT I got 6% on about 18K (fwiw my credit is near 800) from my dealer through US Bank. I looked around a bit a year ago and it seems to have gotten a little better but not much. I've made somewhat aggressive payments and just rolled the 10K I owed onto a credit card with 0% interest for 15 months (2% transaction fee).
I'm getting close to just paying it off and might be looking to upgrade. It sounds like RV $$ may be getting even cheaper lately. 2-3% range is pretty nice, especially if you can take advantage of the tax write-off for 2nd home.