It's not hard to keep fish separate even in a communal bucket or ice chest. Each person can have their own different colored cheap poly stringer, or a simple paper punch can be taken along. No hole in that tail for mine, one hole for yours, and 2 holes for someone elses. We do it all the time on deep sea fishing "party" boats... all it takes it just a moment of preplanning.
Attitude has a lot to do with the way you're treated when being stopped by a CO or police officer!!! If you're polite and respectful, most of the time they will be too... if you're going to be an , they'll be an even bigger !
It's not really that hard to figure out!