My son is a Kenda sponsored rider (10 free tire sets!!) and uses stick-e, nevegal, klaws, kharisma, etc... depending upon what kind of terrain & weather conditions he has to deal with. He used to spend all kinds of time changing his tires, but a little instuction and practice has gone a long way - the kid can change a tube in under 3 minutes during a race... Okay, so he has some access to very experienced (and Pro) riders, and can pick thier brains and learn about technique AND mechanics, but whn he started he was a total loss - not even strong enough to pick his 1st mtb up!
Def - ask some experienced riders to demonstrate tire changing techniques, and quick tube changes, and then practice!