Considering the age, lot of TC owners sold them becouse of troubles getting to high bed.
If he is doing 14'ers, I doubt getting into the bed is going to be a problem. That's usually some pretty steep climbing near the top.
Since you are doing the rough roads, how much truck do you have? Ask because that is generally the significant limiting factor.
Hallmark and Outfitter are the places to at least start looking if you can afford them. They aren't the lightest campers despite being pop-ups. My hard side weighs less than most of their models.