The Steel Wheels, a folk/Americana band, did a tour on bike. Only one of them used a longtail (the upright bass traveled on a bike cart), but pretty cool. So yeah, if you want to bring a lot, a long tail can do it. I think they averaged around 50 miles a day, so certainly not as fast one can ride, but they also did a number of concerts in that time, so it can't be too bad. Of course, the weight catches up to you in the hills; they were in relatively flat Illinois/Indiana/Michigan.