Sorry for the late reply, was preparing for my tuba exam.
Well I've been flying my RC helis on the fields anyway, and they don't really care. I'm not that extreme to bunk off school, to go flying, as the people will know. I'm pretty sure that they will let me to let you come and take off from the playing fields, as you will be my guests. I will check with the groundskeeper, as I will also intend to do some wing handling on site anyway. I'll be better off paramotoring anyway from Freemens instead of gliding (too short for even a reverse winch ~ 200m) . One problem though, between me and my groundskeeper, that the fuel for my heli cannot be stored on site , as a point of info.
Ian- Do you know Epsom Hockey Club? I'm playing there right now, as a keeper and sometimes outfield. Also, you started flying at 12, I'm looking into a gliding club also as an alternative as well in Wycombe to get my solo there next year. I play rugby against Epsom College from time to time...
Dan- I've got little problems with travelling to sites, as I've also got no problem from Freemens to Wycombe Air Park. I'll look into get to Lambourn. Probably near Christmas, 'cos my uncle is moving to around the Swindon area, and I'm staying with him over the Christmas holidays. But I have to agree that its abit far away from Freemens. I'm not sure about fields, but do you know Epsom Hockey Club- they have a field there, and although not 100% sure, but they may let you to launch from there. I'll confirm with the groundskeeper and the head soon.