The prohibition against wheels in wilderness has nothing to do with environmental damage. It's about appropriate use in designated wilderness areas, which, almost by definition, are roadless. No modern goodies allowed.

The basic problem with the Roller Pack is that it just wouldn't work on nearly all back country trails (not just wilderness) that I have seen. What do you do when you come to a three foot diameter log, with protruding branches, lying across the trail, on a steep slope. Obstacles like that can be quite challenging to a lightly loaded hiker.

Don't even think about going off trail in mountainous areas.