Personally I would leave your dog's hair well alone and only trim areas which may cause problems.....over eyes, feet etc....after all, which came first, the dog or the dog groomer?? lol. As for bathing...dogs don't need bathed as often as you may think. Bathing too often can destroy the natural oils in their coat, so you only need to do it when you think they are smelly or have rolled in something nasty
You can get dry shampoos for dogs and doggy deoderant.