Sunday the 27th suits me.
Note:
Having a trial will mean far more than the 4 who'll represent us on the 10th will get to go out and experience the feature and be a part of the event, so that's great!
Also there is a definite knack for getting on the wave and it makes far more sense to work that out before the competition since that'd leave more time and effort available for actually getting out some tricks on the day.
As Niall said, the wave was at a more flushy (ie hard to get on or stay on) level at the weekend so while we'll hope it'll calm down a bit for varsities it is worth bearing in mind that this feature requires some know-how.