i know everyone always asks these questions but i have to ask again... what are the crowd levels like the first week of April? more specifically on a wednesday???
French school holidays start from the 8th April, though some of the UK ones are a week earlier. There will probably be a fair amount of people there, though it certainly shouldn't be mad busy. But please don't quote me on that - other people may know better!!!
Park's should not be as busy as a week end but with holiday season starting it would be wise to aim to be at the park for opening. That way if parks are busy you'll have done most of the main rides