Puppycat22~~you can post your request now on the "Ride Board: Animals Needing Transport" and then go back & edit your post as you get the info needed. I'm sorry, but there are no complete answers to give you now for the questions you asked.
Airport(s) used are picked by the pilots, but they usually choose ones closest to the sender/receiver locations.
Crates also vary by pilot~~some have their own to use, some just tether large dogs with a harness, or they may ask you to provide one. All you can do is post & wait to see if any pilots offer to help & ask them your questions again.