From my experience, my vet wants me to keep my newly gelded guys stalled and on banimine for the first 24 hours. After that turned out for exercize, and I'm to watch for excessive bleeding, swelling. I would think if the vet would keep him the first 24 hours and if you stopped every two hours for him to rest, it would be ok, but your vet is the one to ask. I also know of another mini breeder that travels to have hers gelded, not sure of the distance, but she has told me they do alright on the trip home.