the cats that get altered in out practice go home the same day. i would confine him to one room with his litter pan until the following day. they are sometimes still a bit groggy from the anesthesia so you don't want them wandering all around. especially don't let him go outside. some vets recommend shredded newspaper in the litter pan or a product called yesterdays news. we tell people to just stick with their normal litter. have found that lots of cats will not use the special litter and start going in the plants and stuff. also don't feed him a whole bunch when you get him home either. sometimes the anesthesia makes them nauseous feeling and if they eat they will vomit. thats usually only in the first 12 hours post surgery. if you pick him up the following day after surgery he'll pretty much be normal so you can feed him and let him have the whole house. i still wouldn't let him out though for at least 5-7 days to give him a chance to heal up back there. also lots of hugs and kisses will help him too. good luck.
Mario just got home from the vet. He is already up and roaming around. He didn't even want to lay down. I gave him a bed and his crate, a little food, some water, and his catnip scratcher and it just figures all he wants to do is play with Zelda and watch the mice. I remember when Zelda got fixed, she laid on the floor of the bathroom all night. Just goes to show that pets really do have their own personalities!