We are about to finalize purchase of a Starcraft ultra lite 27bhu. It's 33 ft to the tongue and will be max 7700 loaded. We have a 2015 Sierra Denali with the 6.2l. Weight of the trailer is 80 perc...
Your going to be pushing 800-1000 pounds of tongue weight which is going to leave you about 400-600 pounds of payload. Once you add passengers your going to be about out of payload. As far as the sway goes, a well balanced trailer shouldn't sway. Sure a 1 ton dually will control it better, but if the sway is bad enough it will put you in a ditch just the same.