I will be leaving on a three month adventure in about a week and have procrastinated to the fullest. I will be traveling in my 98 4runner which is lifted about 4 inches and running on 285's. My only traveling partner will be my 97 pound choclate lab "Bailey." I will be sleeping out of my 4 runner alot and traveling an extensive amount of miles. I will be heading up to Idaho first for about a 1 month adventure on the rivers and back country. From there I will be heading to alaska by way of canada. I have plans to stay there for about 3-4 weeks and then head back to the states to look for a new place to call home. With all the mileage I will be traveling and needs for this trip I am looking for some recommendations as this will be my first expedition road trip. Would I be better off with a hitch mounted storage carrier or a roof top carrier? I am worried about gas mileage already with the height of my vehicle and think that the added roof rack is only going to make this number even more miserable. The hitch mounted rack would work except I am worried about how sturdy they are on rough roads and will cause a problem for my dog when he needs to get in and out of the vehicle. Also any ideas on required gear and accesories would be greatly appreciated.