I don't know about the Rajin line, but welcome to iRV2. With your 3/4 ton truck, check the pin weight when loaded and your trucks GVWR.
A 30' should be OK with the truck.
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot