Sail a little fat to keep speed, pinch up to get the bow over, as soon as it does drive down so you ride the backside of the wave and don't pound.
This is great advise. I would add that unlike the open ocean or large bays, on the Great lakes (particularly in the shallower bays) the waves may not be that high, but are often VERY steep and close together. Don't be too worried if you have a hard time timing your pinch and slide action for every wave. If the Saginaw Bay it is not uncommon for the stern to be sliding down one wave while the bow is already near the top of the next one. Just try to get into a rhythm and avoid pounding as much as you can. Those short but steep waves will bring you to a screeching halt pretty quick.