You'll tour for a month then do short(relative)commuting the rest of the time. Consider a light weight road bike pulling a trailer for the tour. Gearing on the road bike may need adjusting depending on the terrain and your pedaling strength. The road bike will be much more responsive(fun)when unloaded than any of the others. FWIW, I have a 20 lb time trial bike(tt)for local riding, but would not hesitate to hook up a trailer for touring.