When I saw just your title I was going to suggest getting a mandolin or uke and play while you're riding to keep your chops up. But now I see you're asking about your biking form.

How long will you be out for? If it's two weeks or less, I would plan my training prior to the trip to be at it's hardest just before you leave. Then use the two weeks as a bit of rest/recovery. There are lots of bodyweight exercises you can do to help the muscles. Think of this as an opportunity to work areas that don't get so much work on the bike. Everything from planks, squats, lunges, pushups, pullups, crunches, yoga, etc., etc.

If you can't run -- and at age 43 my knees are glad that I've never been a runner -- walk fast. Find hills and stairs to climb up at as fast of a rate as you can handle. Go hike in the woods. If you're in a city, find a 20 story building and climb the stairs five times. Offer to carry the bass players 8x10 SVT cab for him. Get two Twin Reverbs and walk around town with one in each hand.

Longer than two weeks, I like the idea of finding a folder. Get one with racks so you can make the beer runs for the band.

And to second Mo'Phat, what's the band? What kind of tunes? What do you play?