Last year I set out on a 2 month road trip all around the western USA. Here is a list of items I leaned on the most during my time road trippin the west.
1. Rechargeable Backpacking Gear
Of course you wouldn't want to forget some Big Year pour-over coffee for your road trip. All you need is hot water, your favorite big year blend, and a cup. Sunbird blend is a deliciously smooth mix, grown in Indonesia and Brazil, while our Cotinga blend is exclusively South American with notes of delicious chocolate, hazelnut, and a rich, full-bodied experience.
4. Sleeping Pad (for real sleep)
My final piece of advise is get most of your gear out of your backseat and trunk and up into some roof storage (or a small trailer). It's a great idea for many reasons: bears, thieves, organization, and peace of mind. Keep only vital or day use items below and pack everything else above your car. I went with a big Thule and got it for less than $800 with all the other parts included. It made me feel safe sleeping in my car where no food was exposed for animals and none of my expensive gear in sight for people walking by my car. Only thing to be wary of is the heat, the top can get seriously warm on hot summer days (park in the shade if possible).
Some last minute items you definitely need: