Picking up a new Fun Finder xtra XT300 toy hauler tomorrow. Really looking forward to getting out in this toy hauler. Hope my Chevy Avalanche (rated 8100 lbs towing) will handle it okay. It has a 5.3 L with a 3.42 rear end. Using the Equalizer E4 12000 hitch. I don't plan to use it for motorcycles or 4 wheelers, so won't carry much weight but needed for the garage space. Looking forward to chatting with folks on the FF forums.
Congrats on the new trailer but you are going to be pushing your Avalanche pretty hard even pulling the trailer dry, especially the transmission and axle with the gearing you have. Fully loaded it would give my 2500 Avalanche with the 8.1 L and 4.10's a workout,
2008 Fun Finder X240
2003 Chevy Avalanche 2500