FWIW: Our RV Journaling came into being when our sales rep presented us with a beautiful journal with a metal plate on the outside front inscribed with our names, year and model. Inside the front cover he placed a photo he took of us and our youngest standing besides our new beast. Very thoughtful gesture and we've used it to log every trip whether a weekend or 8+ weeks ever since. Just a basic diary where we document where we went, stayed, thoughts and worth going back or not. We also for each trip keep a financial scrap piece of paper and log of mileage start and end each day and at the end of our combined trip do a brief conclusion of "must go back", "waste of time/money locations/attractions",, mileage, Nos nights boon docking versus CG's and costings for trip. Having hit well over 40+ states, inc Alaska & Hawaii (not by RV the latter obviously!) albeit in vacation mode, it will serve us well when we slow down and smell the roses heading into FT in about 2 years now.
So we keep it very basic, and at the end of every year since 2002 add up how many nights we spent in the RV so one day when we sell/trade it we can calculate on the depreciation what it cost us per night average (LOL).
Do whatever makes sense to you and is easiest to ensure it doesn't become a chore to keep up to date. I'm an excel spreadsheet person for most areas of our lives but for our travels, just love grabbing the journal and updating quickly and it's easy to throw the receipts as we travel in the back of it until I update every couple of days or so whilst travelling.
It Takes No More Effort To Aim High Than To Aim Low - Reach For The Stars