Saturday Night Blockers

As a newcomer I have just tried (unsuccessfully) to find a Club Site for a week's stay in mid-May mid-week to mid-week, in a given region.

It is rather depressing to find that on quite a number of sites the Saturday night only has been booked, to the point where the site is fully booked on Saturdays but not on other days.

This leaves six useless days with space, because no-one can have a full week without vacating their pitch on Saturdays. The club also loses income from this practice.

Is there a solution to this?