Answer 2: All are good reasons to have a support vehicle. Add in conserving fuel (if your bike had a tiny fuel tank, of course, not if it's stock -- then this isn't a problem), having a place to sit and get into your leathers so you don't have to stand in the hot sun, all suited up, sweating, perspiring, getting faint, etc. Also think about how nice it is to have a cold drink handy, to have a rear stand in the car/truck so you can more easily do last-minute stuff to your bike (lube chain, scrape salt off tires, check oil, etc).