HI, I try to get every color from the table. Others just collect one from each table and some one from each casino. Thats your choice. Also it's best to take a stack so you can have traders. A stack is less likely to be noticed missing than a few chips. If one chip is missing you can always pretend that you dropped it and look around.

For your second question never use your players card when harvesting. Again one chip IM sure they wouldn't mind. Barry