You shouldn't have a fight on your hands.
Let me just say why many places are adament that people keep them at the clinic overnight- it always seems to come down to this, but many times people are just dumb!!! Not us of course

but other people. It is very important that the dogs remain calm- no running, jumping, or bouncing around. Many people do not care?? understand?? I don't know what but they completely disregard the instructions.
I know my husband's friend that owns a small animal clinic makes clients sign a release if they bring them home as they have had numurous cases where clients take their pets home after surgery, the dog rips open sutures, and important internal body parts fall out

they then want to sue the practice because they were allowed to take the animal home. What is wrong with people?
Anyway, my small animal vet prefers that I take my dogs home, citing the reasons stated by someone else in this thread. However, I think those chances are worth taking when faced with an owner who doesn't appear to take the instructions seriously.... Why can't people just listen???