No; in fact just the opposite, as I think there are plenty of good reasons to choose the rockhopper over the voyageur. I have done a fairly large number of extended camping tours both in the US and Europe. I have always used a 700c wheel bike. Traditional touring bikes work great; no complaints. That said, I decided on my last tour (a cross country trip) that I was going to make the switch to 26 inch for three reasons. The first reason is that 26 inch tires are more readily available than 700c. I was running 700 x 32c tires and I couldn't find a source for them through most of MT and ND. The second reason is that you're not going that fast on a tour and a fat cushy tire is just more comfortable over long days at touring speeds. Yeah you can get a pretty fat 700c but that's a big wheel and many touring bikes aren't set up to handle a big 700c tire. Third, everything else being equal, the 26 inch wheel should give you a stronger wheel.

I'm planning on converting my 1989 stumpy comp to a touring bike and I'm retiring my 1982 Trek 720 from active touring duty (so to speak, . Yours in mtn bike touring health, Mike.