Tip number 1, expect to break everything, I show up to big runs with way more crap than I need, then Yohn uses it all................ if you are running on gravel roads, look for sharp rocks, trees (if there are any in Iowa) that have fallen and are looking to catch your wheel, if you do hit one just right it will take out a wheel, tire and Radius arm, I've seen it.
Axle stubs, tools, radius arms, axles, front and rear, oil, water, food,wiring stuff, conectors and all, fuses and fuseable links, a book on your car (chiltons) , and let someone, who is not going on the trip, know the General Area where you are headed, if its in the middle of know where.
Just my 2 cents to add for ya...................
Jeff