Be a Boy Scout! Be Prepared.

I am not trying to hijack your post, but I have put a link to our road trip.
If you are going in June I would recommend the Black Hills Cruise. It is all driving and beautiful scenery.

As for tools I purchased a couple of tool rolls from Bucket Boss. They are great. You can get a ton of tools in a small area. They will even fit under the seat (and they do not rattle). We had 5000 miles on the car when we started and I had a couple of instances where we needed tools. I would also take a tire patch kit, 12v compressor, fix a flat, and a wal mart screw jack.

Have Fun!

http://www.youtube.com/watch?v=jgXINZauUQc