The dress was a-line and quite wide at the bottom. Since my show is tomorrow it is done (though now that I think about it, I havent' tried sitting in it!). I did end up putting a slit int he back, reinforced it as mentioned. I did this after I had the dress on and the thought occured to me that I should check and make sure I can lift it so I can use the washroom!
I was hoping for it to be strapless but alas, me and strapless have never worked out well for various reasons so I have tacked my bra to the inside of the dress giving it straps and support at the same time!
hehe, thanks for all the suggestions, they are excellent.