U.S. glider operations fuel prices

I recently read a a blurb on the SSA home page that claims the following.

High AVGAS prices ($6-$13/gal currently) are hurting aero tow operations.
Ultimately, US soaring will have to adopt fuel efficient winch launch to
keep the sport affordable

Locally here in Ca we currently pay $5.60 per gal 100LL and there is an
airport 20 miles away charging $5.21 per gal. An online search of current
fuel prices shows that throughout the six continental U.S. regions the
average price per gal 100LL is between $5.43 and $5.76. Is anyone aware of
any U.S. fixed glider operations paying $13 per gallon, or for that matter
any fixed operations that are paying in excess of $7?