We have had summer meets there in the past....useually not a problem with parking as most of the visiters to VW lake park over the road to avoid paying the £4.00!
Those of us with Japanese cars will not be there on 24th as we have the biggest jap meet of the year that weekend (some of you will be pleased to hear...lol).
Trouble with July is you are going to clash with something ... how about an evening meet ... say a Friday starting at 7.00 pm? Its light until fairly late. Not sure what time the car park closes though ...