We've been traveling almost 10 years as fulltimers. I'm finding my memory is fading as we criss-cross over the same roads occasionally. So we use a combination of hard copy and electronic.
All Campgrounds are listed in a hardback Journal that sits in one of our dining chairs. But our routes change constantly because our projects change. Also, road construction or potholes change which route we may want to take. Hard copy means I only need to pull out one book rather than open the laptop to see which RV Parks we want to avoid or when we did such and such project.
But all bills are electronically paid through Bank Account or by CC. So everything is paperless. Storing paper in a file box just grows and grows and we don't have room in tiny spaces. I check CC's almost daily to make sure only our purchases are showing up in pending to prevent CC fraud. Then I will pay as soon as I'm allowed rather than waiting for a larger bill at the end of the billing period. Bank, Utilities and CC's still notify us via email when monthly statements are available or when they are charging CC. I reconcile the multiple checking and savings accounts via Quicken. I do it manually every month, but some people do it electronically.
All income is Direct Deposit. Anything that we have on installment is transferred automatically and taken out by Bank or CU. Annual RV insurance is paid by CC, so we get more points or $'s back.
We just paid off our RV Lot and F450 last month via electronic manual debits out of our bank account. Was so easy to do from the comfort of my recliner.
Even an occasional rebate or overpayment check is deposited via Smartphone on a Bank app. No need to use Snail Mail for anything except sending Birthday cards to Grandchildren.
Side note: I also keep all passwords in a spiral notebook. Had done this for years before going fulltime. Some sites are requiring new passwords and I rarely use the same password for all of our accounts. So that's too many passwords to save in my memory bank.