Fat from head to tail!
I've found that the olive oil really makes the trout much more juicy as it is a rather lean fish. All of my marinades have an olive oil/lemon juice base. That perch has got to be super tasty. I got a fat one that was filled with large roe so I cured it with garlic powder and some salt for a few hours and it was amazing on crackers.
We've been hitting it hard up here in CO, mostly at Antero Res where it had the lowest recorded temp in the US of -44F not long ago. It was -22F and -31F on two of our outings but fishing for large cutt-bows and rainbows has been great.
OK, no ice here so went casting for cohos in Lake Michigan this morning. Dang! Caught 5, buddy caught 4. They are delicious this time of year as well. Normal size this time of year of being 15-17" being biggest. All caught on spawn sacks off bottom near mouth of creek going into Lake Michigan. Cold enough for rod guides to freeze but warm enough that didn't freeze butt off. Nice morning of 30 degrees so not bad day outside.