Hi,
I am an avid camper when I go on trips because I don't usally have much money but I have time. Yes, bring a credit card for emergencies if you got one.
I budget for gas and food and figure it by the day. I bring that much cash with me and really watch my spending...it works for me.
For comfort I bring tent, sleeping bag,coffee & the pot with a surplus mess-kit.I have enough tools and extra plugs,wire connectors,tape,parts to bypass the elec. fuel pump if I must,polish for the bike on days when I want to meditate. Of course razor,soap,towels,tooth brush. I do bring new socks, usually enough so I can throw them away and wear a new pair everyday. I wear boots when I'm riding but have comfortable shoes for walking. I have a collapsible 5 gal water jug, when I get camp setup I fill it with water and don't have to run back and forth to the faucet. I bring maps of everything along my route and especially maps of the Bureau of Land Management, (BLM Maps) cause I can camp in those areas for free.
And of course enough fix a flat to fix a semi,I hate flats.
For food I bring 3 cup o noodles for each day and usually fruit cups, and beef jerky enough for the trip, showers are $5 at most truck stops I stop in early before the trucks start shutting down for the night and they have never given me any grief about paying for a shower.
another thing that can be fun and helps to keep things cheap is to use the couch surfer network, a lot of folks will let you sleep free for a night and get cleaned up.
http://www.couchsurfing.org/
The biggest thing is to take your time and enjoy the flowers on the way by, don't let things get in a hurry!
I have traveled from Norfolk,VA to Spirit lake, IA then to Dallas, Tx to Atlanta ,GA and backup to Norfolk,VA then out to Alameda,CA By motorcycle.
I have always been stopped by cops (just checking me out) and I have always met great people and had fun.
I hope it works out great for you, Have fun
