Due to your possible size, I use the "trucker rule". If a truck will fit, so will I. There are books
Trucker Books that truckers use that you can often find in truck stops to aid you planning. My favorite was called "Exit Guide" which maybe called "Next Exit" now. It told you what was at every exit. That combined with Google Maps satellite views you can pretty much plan any trip. There are even app's which you can load to your phone telling you what's at the next exit.
When not on the Interstate I found a Truck Stop Guide to be helpful. Many non-interstate truck stops were the Mom and Pop type and the chance at a good meal or one within walking distance.
I have not used the app's but when I ran long haul I was so tired of truck stop food that my Exit Guide book was full of notes of every Mom and Pop I could park a big truck at.
Remember getting there is half the fun :)