Ask the Surgeon.
The Surgeon and his/her team, would or should meet with you.
To explain and tell you about it and after and the recuperation etc.
They will also send you home, after the surgery, with a packet of information and aftercare, information. And meds etc.
If not, ask them for handouts.
Ask the Surgeon, anything you are wondering.
That is what they are there for.
When my daughter was 7, she had surgery for a Hernia.
It was general anesthesia, and the Pediatric Surgeon and the team, met with us. They explained everything. And after.
My daughter's surgery, while not the same kind as your son, but her recovery was about 6 weeks.
We informed her school, and about her condition/what she can or cannot do etc. and the Teacher and her classmates, all as a team, helped my daughter.
The key is, to ask the Surgeon or the hospital, all your questions.
Because, it is not generic info.
He may or may not be able to eat before or after.
After the surgery, recovery will take time. And the Doc will be checking on him after etc. Your son will be there for 4 days after his surgery. The Doc should be telling you, what is allowed or not, to bring in.
I assume, bringing some sort of lovey or comfort object is fine. As well as books or what not and some clothes for him to go home in. But ask the hospital.
Per the wheelchair... is your home, wheelchair friendly? Is there any stairs??? ie: is his room and the kitchen and the family room and the bathroom... all on the same level of the home??? Can you then, wheel him around to where he needs to go? If not, is it okay... to carry him??? Or not? And if you are allowed to carry him per the Doctor, how do you do it safely and per his incisions etc.? ASK the Doctor, how you can transport him.... in the car and at home... and what you can do or not.
This is very important to know.
Also, can your vehicle, accommodate a wheelchair??? it folds, different types of wheelchairs.
How will you transport the wheelchair in your vehicle, for your son?
Will he be able to sit in his car seat and per the seat buckle if he is in the car?
Will he need to be in his wheelchair, 24/7? Or can be be in his bed to sleep? If so, how do you transport or carry him, out of the wheelchair and into and out of the, bed, safely?
What do you do for any pain he has?
What about bathing him??? How long after he is home, can you bathe him or he be in a shower? Can the wheel chair fit in the shower? If not, then ask the Doc, how to bathe him???
What about his bandages?? When will he need to go back to the Doctor for follow-up exams???
How are you supposed to care for his bandages and change his bandages??? What do they recommend, you buy, for him, to do this?? Ask the Doc.
Will he need to go to physical therapy or anything after his recovery?
What do you look for, as he recovers, to know if it is healing fine or not?
All the best.