Financing, any specific orgs to stay away from?

Anyone had a particularly bad... or good experience with Financing an RV? The last time I did this a few years ago I used whatever the dealer set up. This time I'm purchasing used private party and want to be a bit more deliberate about finding financing.

I would love to hear about any bad or really good experiences you may have had with financing. If you're not comfortable posting publicly, please do DM me.