We have been camping for 32 years and I started keeping a camping journal back when I purchased our second PUP 28 years ago. The salesperson gave us one as a little gift.
We keep moving the journal from trailer to trailer. It's great to look back and remember all of your travels, kids first trips, our dogs, family & friends who camped with us, etc. I always kept track of costs as well, price of gas and campground costs per night. We used to camp with W/E for $6 a night in a private CG that now charges $70 a night and gas is now $4 a gallon.