$28 dollars on the TWD website and im all set.

Just go buy the stamp at the post office and get it right then and there.

I got stopped opening day by two game wardens. They were very thorough; to the point I was wondering if they were going to do a body cavity search before they left. I had not received my stamp in the mail, so it was not on my license. Both game wardens agreed that if it says you purchased it on your license that is good enough for them. One of them told me he had not received his in the mail last year. They told me not to worry about it. If these very thorough game wardens said not to worry about the stamp then I am not going to waste the effort of trying to track it down in the mail system.