Hi Sue Ellen!
Congrats on your new Airbnb and welcome!
In my four years of hosting, I've obsessed about cleaning and taking care of those rare longer stay guests (usually not more than two weeks.) If they were there for a couple of weeks, I would provide ample towels and extra linens, and I would also offer a complimentary cleaning day sometime after week one. This was, in honesty, to help me not to have too big a job if I had a same day turnover after a long stay. Nobody expected this of me and all were delighted that I would offer. But none of them really wanted it - anything more than I take out dirty towels and maybe vacuum a little. And my guests were usually super neat anyway. I would leave a checklist for checkout, and 99 percent of them would follow it.
As for entering the space, I always saw that as a no-no. I would regard that space as sacred and rarely enter unless invited, and NEVER enter without permission. The guests need to feel that they can trust you, and even though it is your house, I would highly recommend steering clear of the rental space unless you've specifically agreed otherwise. Secure guests are happy guests!
Hope all goes well this season! Good luck and have fun! 🙂