Put. The. Iron. Down.
I iron pillowcases, then chuck a throw over the duvet to hide the creases. Things are bound to be quieter after the summer, but on the other hand the number of reviews you have will increase and you will become more sought-after. Keep an eye out for local events, big employers, places running workshops and courses etc as they can all be potential sources of guests as well as passing tourists.
Since my messy guests left, we've had a run of really lovely guests - a German doctor who was off to do some hiking, a father and his 5yo daughter who are here to help her learn English, a pair of violinists who arrived in the middle of the night and now we have an academic who plans to hole himself away on the top floor for a few days writing his dissertation. They are all the sort of people who I feel comfortable giving the run of the house to, and DD has loved having another child around to play with. I do feel a bit like the old woman who lived in a shoe at times though - came home this eve and realised there was 3 different parties of guests on 3 different floors of the house (I have two Airbnb rooms but inbound and outbound guests were both here at the same time for a while)
I'm going to be really picky about who fills any gaps for the rest of august as it's only a few weeks til I stop doing Airbnb for a while and enter the corporate world again. Got loads of things I planned to do over the summer but duvet wrestling has taken up more time than I anticipated.
Rocky - it can be really overwhelming at times with a high turnover of guests. I'm sure you have your own survival strategies but mine are: get breakfast stuff out and ready the night before, get beds stripped, bins emptied etc as soon as guests leave, make sure you only do room turnarounds, house tidying etc in the mornings (I don't feel my days are eaten into too much that way) and duplicates of all linens and towels ease the pressure on getting everything dry.
My linen arsenal now runs to: 12 towels, 4 duvet covers, 5 fitted sheets, 10 pillowcases and one posh throw. The throw alternates between rooms - I tend to put it on the bed of whichever guest I think will like it the most and is less likely to damage it!
And of course our own bedlinen/towel collection is mismatched and fairly scrubby. In fact one of the towels in the cupboard was my parents' wedding present and they got married in the 60's. Maybe we can make use of all the nice stuff in winter when the guests have gone...