I just picked up a 2001 Toyota Tacoma xtra cab, V6, TRD. We are planning on driving from New Jersey to Central America and possibly South America. I don't plan on doing any crazy off-roading, but we do plan on driving on dirt roads through mountains and forests, beaches and through rivers, Basically wherever the road takes us, and wherever we find campsites, and I know those roads are badly maintained. What type of suspension upgrades should i look into? What other mechanical upgrades do i need to consider for such a trip?