The problem is not so much the cooking club, but the bull-pens. They could move the pens together on the third base side and extend out seating to the wall on the first base side. See if tennis would be willing to give up one court for the double pen on the third base side.
Or, extend the new grand stand and first and third base seating up to a second deck, like at Texas A&M.
I would not touch the trees.