What ever happened to a set of spiral notebooks for each area you fish. I have a book for each area I fish on a regular basis and one labeled "1 hit wonders" for places I don't fish very often. I write the date, tides and weather when I start and the location,depth of the water, depth of the rigger and bait/lure for each fish. I also try to note if I was trolling with, against or cross current and any other info that seems important (lots of bait in the area, lot of dog fish, fish taken near a shelf, etc...).
Doesn't take up much room in the boat and can also be a neat little scrap book if you tape some pictures in there after your more memerable trips.
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bawddawg, no biscuit!