Hey Glad to see another person from my area OCing. I have been OCing for awhile in my area, but I have done it several times in Sioux Falls.
1. Follow State law like you mentioned.
2.Be courteous to others. Answer thier questions if you want to.
3. Be more aware of your surroundings
4.Be courteous but stand your ground. you are a lawabiding citizen and doing nothing wrong.
Look around on the forum and read some LE and CIV encounters. Also actually go out and OC. Please PM if you have some questions.