What school are you at? Recruitment clothes depends really heavily on what the school culture is.
If the the school has a less formal round that is shorts and tshirts, you might try a pair of khakis and a tshirt, or a pair of beach pants and a tshirt.
If the school has a first round that is mostly sundresses, you could try a less formal maxi dress.
Like these, maybe:
http://www.lillypulitzer.com/product...+Shell+Shacked
http://www.zappos.com/maxi-dress-flo...oral+print&p=2