Difficult to golf as single?

I'm planning a golf trip to sapporo next month, preferably to play hokkaido golf club or somewhere similar.

However, I'm running into the issue of clubs not wanting to guarantee a reservation for a single.

Does anyone have any experience with this? I have a sort-of reservation at one place, but they're clear about "If the minimum number of participants specified in the plan is not reached by the date the event is to be held,
Please note that the event has been cancelled and your application will be withdrawn."

Just wondering what the success rate is for this sort of thing, and how many backups I should have in place if they fall through.