Nothing wrong with a 19.5” rainbow but tell him if he wants a mount go for the trophy rainbow.
For big crappie if you wanna see them they put them in the tionesta fish hatchery aquarium. They usually put a couple in when they do the electric shock surveys on lakes around the area.
I got a found a couple skulls one was in perfect shape. I cut the antlers off should of kept it whole. One I got must of been in the creek floating around for awhile but looks like a big flood pushed it up and on shore.