To get a yes, all you have to do is sell it. Meaning Pilots + Staff + Organization + Enthusiam (lots) and a clear understanding by all of the increase risk of failure to succeed due to wx. I could see combining a 4 day contest with other glider activity as a backup to no fly days. Like glider annuals, competition lectures, trailer maintenance updates, sporting clay shotgunning. So, no fly days would still have activities to draw pilots, achieve something of value more that cruising the aisles of Walmart.
Then again, enough willing is about all you need.
I believe the Competition Committee would love to work with you to make your dreams come true.

R