The problem with remembering a season is that you remember the fish and forget the conditions.
You will tell someone, honestly, that the big one came off the point in October. What you will not remember is that the wind had been northerly for two days, the water had dropped four inches, and you had gone down two sizes on the leader because the first three casts spooked everything. Those are the parts that repeat.
What is on the sheet
Conditions at the top, because they are the thing you will not reconstruct later. Then where, then what you used, then what happened — including the hour, which is the single most useful field on the page and the one everybody skips.
The bottom third
The bottom third is for what did not work. It stays blank for the first few trips and then becomes the part you actually read back, because a log of successes is a scrapbook, and a log of everything is data.
Print it and forget about it
Print ten, put them in a folder in the truck, fill one in before you drive home. That is the entire system. It costs nothing, it works in the rain, and in three seasons it will be the most valuable thing you own about that water.