I have a "procedure" I've followed for the past 13 years or so. I start the engine, set the idle up and while the coach is airing up, I disconnect the sewer and water. When I hear the governor kick off I go back inside, kick down the idle and turn off the coach. I then pull in the slides as per mfgs recommendations and complete my preflight checklist. I start her up again and pull out. Sometimes I will leave it idle while hooking up the toad which takes all of three minutes. If this procedure "offends" anyone...too bad. It's what works for me. Get earplugs.....Dennis