APT wrote:
rexlion, you did this travelling with 6 people on-board? Air bags on a Sienna will make it just as capable as a Highlander with a lot more space inside and keep the nimble handling. Both will be quite overloaded with 450 pounds of TW and 6 people. As with so many things in life, RV type involves lots of compromises.
Who said anything about 6 people? The OP mentioned 2 teenagers; that would suggest 4 people. 2 teens, probably an extra 250 lbs or so in row two... no big deal. 2016 HL Ltd has curb weight of 4354, GVWR 5840; looks like plenty of capacity.
Some days when my cargo trailer was loaded to about 425 lbs hitch weight, I had another 75 lbs of merchandise in the rear hatch of the HL. No passengers on those days, however. The vehicle still has its original suspension; the mechanics check it for me when I ask and they tell me the struts and everything are still fine. It amazes me, after the beating I've given this vehicle.
I agree that air bags on the Sienna would be a helpful option in the OP's towing situation, but there's still the issue of the receiver's ability to stay bolted to the vehicle under a load that exceeds its rated capacity. For that matter, the receiver itself could break a weld. If sticking to the Sienna, best that the OP spend the money with the experts at Can-Am who will set it up right... and air bags may or may not be a part of their recommendation, I don't know.