Four large artists' impressions have appeared in the local paper recently, all very neat and indexed as to what the various sports facilities will be. They fill the available space admirably, BUT, not one mention nor any obvious plan provision for CAR PARKING!
Perfectly understandable that you should raise this, but a little known and publicised fact of modern planning reg's for major developments of such facilities is precisely the opposite.
When push comes to shove, the developers contribution to keeping polluting cars away from the area and their major contribution towards the provision of public transport facilities will sway the decision.
For example, if the area was under developed with no airfield there and you wanted to build Wycombe Air Park from scratch with a promise of many jobs being created, there's a far higher chance you'd get approval if you promised to somehow ensure that there was plentiful public transport at key times and minimum facilities for car parking (other than temporary essential access).
That said, it makes perfect sense that the developers behind Wasps should get the decision, the Rugby club and the Football club both pay significantly more in local rates than the airfield does, they also provide far more year round employment than the airfield and always will.
As a real aviation supporter I would be very sad to see Wycombe Air Park go elsewhere, however, business is business and if it closed the key people would move with it, the remaining few who didn't want to move have many options in the local area.