For the areas I have people in the summer lake trout are nearly the only trout type. They are my favorite to eat especially if you stay with say 4-8lbrs. Skin down fillet on foil smothered in spices and some herbs, tent the foil and cook over open fire for 20 minutes or so.
I have clients who prefer barbecue sauce on the fillet while grilling and others that really like them lightly seasoned and then brushed over towards the end of grilling with a honey, soy sauce, butter mix.
I like it all.
Osky
