Hi @Kathy226! Welcome!
The calendar actually provides a good amount of flexibility in pricing, though navigating the options can be a bit tricky at first. You can change the required length of stay for different times of the year, and can change the price manually for any given day or any number of highlighted days at a time. You can also offer discounts for longer-term stays if you like. The cleaning fee is fixed at a set price per stay. However, you can add an additional cost per guest. You can also choose to make a "special offer" when someone requests to book. The special offer option is often used to give someone a discount, or to add an additional fee if you charge extra for something like a pet or use of a facility.
It sounds like you might want to put a required length of stay for the summer months, so you will only receive inquiries for stays that are worth your while. Another option would be to raise the price in the summer but offer a discount for longer stays.