TOTALLY! Jello is the best way to go before cleanout. orange, red, yellow...any color!
colonoscopies are not fun at all. I've had about 10 colonoscopies and endoscopies in the past seven years. I'm sorry... but, if this is your first, don't expect it to be bad. They will just totally knock you out. And if you don't like needles (which would be hard having CD and all) ask if they can gas you. NO PAIN!