Honestly the Roubaix is near ideal for the kind of actual riding you're describing. For the money you can probably just get the bike shipped fully insured. On the ride itself, you're supported, so in the odd chance that something breaks there's the sag wagon. I have a long haul trucker and the idea of riding it in a supported ride of that distance when I had access to a Roubaix (I rode one the other week, was pretty sweet) isn't personally appealing. It would of course work just fine, though. I would only really recommend the LHT if your goals at some point involve fairly substantial loads; there are better bikes for other purposes.