Prior to any certified ride attempt, I've pretty much planned stop to stop with bump room, and also looked at fuel in +/- 20 miles from my pre-planned fuel stop. I use google maps for route planning and checking fuel and timings. I plan on 10 minutes additional time for each fuel stop. I build a google sheet that tabulates rides, and has links and any specifics of a ride if it needs anything specific. I also log my fuel consumption so I have a pretty good idea of fuel usage based on average conditions.
I also consider if I'm going to eat anything or just drink water and the occasional RedBull. The IBA Archive of wisdom says to back off caffeine prior to an attempt, but then how would I get through my work day..?
I would also state, plan your ride, and ride your plan. I recently wasted a Labor day ride last September as I was 20 miles short. My plan had plenty of overage, but after we came across the big US Flag in Bonners Ferry, we scrapped the big flag in Olympia. Buddy didn't want to ride in Seattle to Tacoma traffic in the rain, After many calculations, I't looked like we had it based on ODOMETER numbers. We didn't, and we figured it out on beer three. My odometer is 5% high.
Spotwalla -have Spotwalla dialed in, and familiar to you and your loved ones worried about you riding all over the countryside. Share the link and check it at each fuel stop. Upload your photographs of your fuel receipts with your odometer on the picture.
Have your seat, your highway pegs, your handlebars, your phone mount, everything 100% squared away. Don't do an oil change or tire replacement the day before, maybe a week before and go for a bit of a ride.
Anyhow - have fun mostly. I mean all the preprep and such is buildop to YOUR big event, so enjoy doing it. All my BS ramblings are my way of doin the IBA rides, and I have a long Canadian winter to get through, and a shorter riding season - so I need to try to be efficient...
Have a good one.
H