With your truck and the desire to tow a trailer, I would say you can go up to 10', than use a curt hitch extension @ 2' with weight distribution to tow a 7x14 box trailer fine. But I only load one BMW 1200, 2 dirt bikes, or an ATV. this hitch limits you to 8000 lbs tow, 800 lbs tong weight when used at 2' extension. Not sure if it work if your trying to move 1500 lbs of Harley's
there are other more expensive solutions that allow you to tow with longer campers in bed
Good luck finding something on east coast. they are few and far between to start with. Here is where you can start your search.
Phila Craigslist couple over in NJ but no telling what they really look like, sellers don't take pictures of rot when advertising. I started with a used one I found on craigs list.
Hate to say it, but on the Right coast the market probably has 10 used motorhomes available for every 1 truck camper. while they both have the same rot problems, you may have better luck finding a clean used smaller motorhome.
