I have the HF 3500W and a Champion 4750W dual fuel to choose from. I've used them both on my TT on 90 plus degree days to run my 13,500 AC, microwave, fridge, and TV. Both are electric or pull start and either one will power the camper. The HF unit is very quiet running around 52db @25' and the Champion is louder running 67db at 25' which is not a campground friendly noise level.
I probably wasted money buying the extended warranty on each but both combined were still less than a Honda 3500W.
The HF comes with a 30A trailer direct plug-in and the Champ came with an adapter from twist lock to TT plug.