Weddingbee boards

My dress is http://www.casablancabridal.com/collections/view/1/1 (casablanca 1910). I am having the bridal shop rebead the belt (smaller more dainty crystals but more coverage area) and add some beading to the end of the tails. they are also going to nip the bodice a little bit (it is actually straight across). Anyway- my question is about a slip. I am thinking that I'll need a fit and flare but the one I see at Davids has pleats and Im thinking you would be able to see that through the dress. So... any suggestions of what brand or where I should look at fit & flare slips that are smooth and where exactly should the fluff start (knees, calves etc).

THANKS!

amy