I realize this may sound dumb to some but I've never flagged a cab. I don't know the "rules" of cab riding. My dd and I have decided to take a bus from Mdsn to Chicago. We will take a cab to hotel and the zoo etc. If someone flags a cab for me do I tip them? At the hotel how do ask for a cab? I assume I tip the cab driver? How much? Do they really take the loooong route to charge more money? Help, this is stressful!!!