I would recommend you get their car trailer instead simply because it has surge brakes. I don't think their dolly has brakes. You already have a somewhat heavy camper.
But either way you choose to go, you're going to have to take a tape measure down and measure tongue length vs. turning radius. It is't that you can't tow either one in a straight line, it's when you go to turn, you don't want corner-to-corner contact.
'15 F450, 30k Superhitch, 48" Supertruss, 19.5's, Torklift Fast Guns
'12 Eagle Cap 1160, 800watts solar, Tristar MPPT, Magnum Hybrid 3k Inverter
'15 Wells Cargo 24' Race Trailer, 600 watts Solar, TriStar MPPT, Xantrex 2kw inverter
'17 Can Am X3 XDS Turbo