A male’s neuter is so much less invasive than a female’s spay. Make sure he has food available to him all the way up to the surgery. He should be allowed to come home the same day but it depends on your vet clinic’s protocol. At home, keep him quiet, in a place where he can’t jump or run which he won;t want to do anyways. Normally you’d want to wait out three weeks at least before beginning a newly-neutered rabbit’s bond, but you say yours are already bonded. I am assuming that Chip is a young rabbit. How old is he now?

How does your female put up with the endless humping? How did you bond them? Your female must be very submissive.
In order to maintain their bond I would place Chip in a carrier or small cage within their habitat so he can rest up after the surgery but still be around her.

I can’t add anything to what Petzy said, and I really ditto that the neuter will be so much easier on both of you. Try to send his favorite veggies with him if you can

Read his behavior to know how long they should stay separate. If he bounces back pretty quick and doesn’t seem humpy or anything, you may be okay doing some supervised playtime between the two.

Many vets suggest putting the rabbit in a carrier for the night after the surgery so the rabbits do not hop around and open stitches if they have stitches. I didn’t mean for you to leave him in a carrier for a long period of time, just the first 6-8 hours post-surgery. But go with what your vet says. My main worry would be that Chip will hump Hazel after the surgery when his anaesthetic wears off, because his hormones will still be there for a while. I don’t know if humping soon post-neuter can cause bruising on the male. Ask the vet.

My boys were supposed to have restricted activity for 10 days post neuter. So they were housed separately until then, but still near each other. I was super nervous too, but they did really well and they have almost stopped humping entirely. Before it was like a hump-war zone.