attached to my 40D for 7 days in Utah? Leaving in late May for a trip to Utah and also the Grand Canyon to visit all the parks plus anything else you regular visitors can recommend. Will my two lenses be good enough for this trip or do I need to rent something keeping in mind I'll be traveling on a motorcycle. If renting I can only afford to rent one lens so if mine aren't good enough which would you chose along with only one of mine. Remember on a motorcycle you are limited to how much you can carry.