Yes, you decide on what days guests can check-in and on what days they can't.
Note: by default, all days are noted as check-in days.
How to edit the check-in days
1) Go to 'My fishing cabins', select the listing you want to edit and click on 'Edit fishing cabin
2) Click on 'Rates' in the horizontal menu
3) Click on 'edit', on the right-hand side of either the 'Base rate' or any 'Special rate' you want to edit.
4) Now set the 'Check-in days' (third option from the top of this section).