The island is at its quietest between the runs. Two of you, a fire table under the porch roof, and no reason to be anywhere.
This is not a resort with a spa. It is a cabin on an island where you will not see another person unless you drive to one.
Avoid the last week of September and the first two of October unless you want the river circus. Everything else is quiet.
Anniversary, proposal, birthday — say so when you book and we will make sure the fire is laid, the place is warm when you walk in, and we stay out of your way entirely.