I don't know about the feeder sites but here at Turweston we were running a 2 bay RRR site and a mobile bowser in the helipark. The site at Greatworth came to us to refuel their mini bowser . The bowser at Aynho arrived on site full this year in the past that has also come to us to top up . We Had around 50 helicopters in the park slightly down on last year .
Regards Chris