I remember using out C-150 in the wave over Wurtsboro, NY many years ago, (I fly out of Middletown, NY, about 12 miles away).
Not good enough to rig a sailplane, but gaining "yoke time" in power. Tuned in the local glider frequency and heard local glider pilots commenting on the "power guy" by them. I replied my intentions, stated I would avoid them, didn't want to waste a wave day.
Power at idle with carb heat, worth the flight.