Managing way point for different lakes

[6poundtest]

Guys, I've confused myself and need guidance.

I'll be fishing 3 maybe 4 different lakes. I'd like to have a set of waypoints I can add to or subtract from for each lake. I have Humviewer installed on my computer. Is it all done from there or will I be deleting them from the unit (598) before going to a different lake? I guess I'd like to have a file for each lake that gets modified as needed after each trip.

Sorry for the stupid question.

I have a number of recordings and snapshots from the testing I did last fall, too. I don't need them on the unit any longer and will delete them. I do have the files stored on my computer if I ever want them back.

Edit to add: I also have HBPC installed; haven't worked with it much yet, though.