My main focus with this question is on road, specifically through the mountains. I know my wagon will be a dog on steep grades now. I even had trouble in the black hills. I know part of that is carb tuning tho. I have an aussie in the rear and an ARB up front. I will be soon putting in a doubler so I am not concerned about trail gearing. I would say that yes, I will be going to 36" or 37" tires once I do a spring over, but it may be well over a year before I get that done.
I'm really just looking for feedback from those who are used to the mtn passes and such. Thank you for the input!