I found my R1200RT got amazing economy at 65 to 80 mph over 50mpg. The big boxers being quite efficient on tarmac. With the interconnectivity we have these days, I suspect things like closed fuel points should be easily ascertained. Up ahead trail conditions likewise. My wife’s nav app in her car reroutes in case of traffic issues, warns of speed traps etc. This tech is here, hard to imagine it’s not being utilized for moto travel. It does depend on others going the same way. But seeing as adventure travel is one of the fastest growing segments of recreation right now that shouldn’t be an issue. One should carry a little extra fuel, just in case but gallons seems overkill in most situations.