Hobbyists: AMP tipping

So, I'm new to all of this. What do you guys tip at the local AMPs in order to get what services? Not really sure what's expected...

Go in and pay your 160 or 200 (depending upon which place your in) up front and everything will be understood.

I have also never been to an AMP, but I was thinking of going to the one in Port Allen. I am crazy nervous about it though. Do I just walk in and hand them 200 and its good to go?