I know they do it in New Hampshire, and you can see the quality of the fish released...lots of mid 22-26" bass. Looks like they only measure the length, perhaps they have the same rules about transporting fish, so they couldn't certifiably weigh them. I think the C&R program seems pretty awesome, although I'm perfectly happy with a picture and my own 'official' weight. I think the quality of scales these days are pretty good, so if I'm off by an ounce here or there, its not a big deal.
http://www.wildlife.state.nh.us/Fishing/trophy_program.html
Did you eat the pickerel? I don't know if I ever heard of anyone eating pickerel, pike obviously, but not pickerel.