I second this... My sister bought this for herself and it worked awesome... She did it on me too and I was pretty impressed. It is a bit pricier... but it is your wedding too! If you exfoliate and use it once, you can wait a couple days and do it one more time.... Make sure you don't do it fresh within 2 days of your wedding (just in case).
St Tropez is amazing. I use it all the time. Its expensive but it leaves a perfect tan all over and no streaks. Just remmeber to follow all instructions. Moisterize ankles, elbows and knees first after your shower, before u put the tanner on, and your good to go.