I wasn't permanently connected, and was using the unthreaded TM inlet, but I still got yelled at.
Last time we dry-camped we alternated between using our 5-gallon Coleman shower and a 3 liter Shasta Cola bottle that I had washed out to fill up the tank. Those 3 liter bottles have a mouth that is the perfect size to fit into the TM inlet, and they are a lot easier on your back. Plus, I can get even my daughter to do some of the filling up, it takes a few trips but it gets filled up quicker than you'd think.