Banks will put a $2 to $3 charge on ATM withdrawals. That can eat into your budget. An alternative is to get cash advances with your grocery store purchases. Most grocery stores, Wal Marts, Targets will let you get a cash advance on your debit card at no charge. They usually have a maximum amount that they'll let you get (usually in the $60 range). If your debit card looks like a Visa or Mastercard, you should be able to get cash at no charge at grocery stores and the like.
In many states, purple paint is equivalent to a 'no trespassing' sign. If you see fence posts, rocks, trees... painted purple it's the same as a 'no trespassing' sign.
This isn't specific to touring in the US, but you should know how to make most repairs and adjustments to your bike yourself. There are great videos on youtube showing you how to adjust brakes and deraileurs if you don't know how.
Finally, I'm a huge fan of having your bike fitted properly. There are also videos on youtube on how to fit your bike. Watch a couple and make sure that your seat is the right height. (I always start with it at 107% of your inseam.) Then adjust your seat front and back. Then get your handlebars dialed in.