We have the 2014 version (8310SS), and pull it with an F150 with ecoboost and Max Tow package. Took it to the scales LY on our first trip to Banff and were ok all around (once I tweaked the tongue weight slightly by raising another link on the chains). Have pulled about a dozen times LY with no issues other than wind gusts (I was a newbie LY) - I am adding a second sway bar this spring to accommodate that. Without major winds or hill climbs near Calgary, I rarely felt the TT behind me. Just make sure your WDH is set properly and I suggest the 2nd sway bar since you are pulling 35'.
Enjoy your 8312. We LOVE ours!
2014 Rockwood 8310SS Diamond
2014 F-150 Super Cab Ecoboost w/Max Tow
Nights Glamped - 2015 - 24
Nights Glamped - 2016 - 4