The wife and I have been pulling our North Trail 31RLSS all across Florida for the last 2 years (my only experience) without any issues, in fact it tows great behind our 2011 Toyota Tundra w/ the big V8. I have the best in a WD hitch, brake system, etc. In late August we are taking our first real adventure driving the trailer from Ft Myers Fl to lower Michigan. I have never been in any type of mountains w/ the trailer and I am not sure what to expect as it is a fairly big trailer. Should I go around them (I-65) or go straight thru on I-75? Any feedback and/or assurance would be very much appreciated .