There are a variety of logbook options for chartplotters, for events on specific voyages ("Great White Whale sighted off the port bow"), for saving tracks/waypoints/courses, recording your fuel consumption, and even scheduling maintenance for your vessel.  

Some chartplotters have features that are especially attractive to boats with a common owner, for exchanging information or getting a "big picture". At this time, there is no standard for exchanging recorded tracks, but you can generally assume that it is possible, if sometimes complex, to exchange tracks and waypoints between different copies of the same brand, and perhaps model, of chartplotter.

In general, PC-based chartplotters can store much more information than can self-contained chartplotting dvices.

When you have a lot of trips, waypoints and  tracks to manage, there is one freeware tool to help: NavPak Companion.