I'm glad Parker got a chance to participate in the decision making process. You are teaching him to participate in his health care and make informed decisions after carefully considering all options. He'll have that skill for life!
Good luck to him with the procedure - it will likely not be a big deal at all. Our hospital had someone (social worker or outpatient specialist? ) come in right afte the procedure and she took our insurance info and set up the first delivery of supplies (bags, pump, formula, powdered enzyme, tube extensions (they connect the tubing on the bag to the tube in the tummy with a nice snug fit)...)
It had all arrived at our house by the time we got home from the hospital the next day.
Let us know how things go!