My wife and I also glamp with our Flagstaff 27RLWS. We tried dry camping for the first time on a beach in MA. I brought along our Champion 3500 that is our emergency home generator and although it diid the job, it was noisy! We meet an number of people at the campground and the Honda, that was recommmended in earlier replies, is the way to go. We would have to walk right up to the unit to hear if it was actuallly running.
The second consideration is the total amount of draw that you will be using at any one time. Coffee makers, like my Kurig, draw an incredible amount of juice. Anything that generates heat, like hairdryers and vaccum cleaners are hogs. look at the appliances that you think that you will be running simultaneously and add up the total power needed. That should give you a starting point.