Originally Posted by RobertK
Based on my personal experience, I think you'll have two issues to deal with when towing your T21TBHW with your GMC Terrain (and even a GMC Acadia).
Hope all this helps you figure out what is right for you.
Thank you so much for making such a detailed response. The information you provided is extremely valuable. I do have a 6 cal Terrain, rated at 3500lb tow capacity.
Looks like I will be traveling with a very light load. I don't plan on towing the T21 on any trips that will require major incline driving or extreme mileage.
Thanks again and happy camping