I volunteer to "crew" with U-Ken-Do Ballooning out of Highgate. There is a whole ritual that is done at the end of a commercial balloon ride. It includes history and champagne. To my knowledge, it is always done with comercial rides. Often champagne is shared with the landowner, sometimes a bottle is given.
The deal I have is that I crew 5 times and get a free balloon ride (retail value is about $250/hour). I have been in the chase vehicle and I have been with Ken and the balloon at a fundraising event selling tickets. He raffles off balloon rides to raise money for Camp Ta-Kum-Ta. Nice guy.
http://www.hotairballoon.org/vermont/Margo Rome