Another Dodge guy! Yeah, I would look at what the tires are rated to carry vs just looking at the letter designation. You would be supprised what you find out. As far as where to start, I would suggest just spending some time reading what other people on here have done, or are doing. That is what I am doing, and if there is something specific you want to know do a search or post your question. You also have to figure out what type of overlanding you want to do, as this has a different meaning to each person.....I hope this helps,
2003 F-350 7.3 powerstroke CC dually the "Mule"
1982 Chevy 3/4 ton 4x4 adventure rig in progress