Lol, how bad is your housekeeping if you don't want a groomer to see it?
Seriously, I thought most mobile groomers did the grooming in the van, my DIL uses one because she has a lab along with her Maltese, and it's easier having someone come to her, but the dogs are groomed in the van. I take Joey to his breeders, I just don't trust some of the bigger places. I'm with you on not wanting to leave them at a store.