Taking my dog on a cross country road trip?

My best friend and I have been saving up for a trip all over the US for a long time. We are probably going to be gone for 6-7 months. My dog is coming with us. I have a 2 year old merle aussie. He is an awesome dog. He loves going in the car, going camping and seeing new places with me. We are going to be camping in a lot of major forests. We are especially looking foward to Montana. Does anyone have any advice/ideas or tips for us? Ps we will be sleeping in our van some nights, camping, and others we are couch surfing(everyone is okay with my dog)