Larry Dighera wrote:

But when I discussed this with a CFII, he said, "what goes up, comes
down." His advise was to hold a constant airspeed while flying VFR
through wave activity, and permit altitude excursions to occur.

As a glider pilot, I've never understood this hold-the-altitude-itis of
my motorised brethren. Deliberately wasting this huge amount of energy
which mother nature offers for free!

Stefan