Whatever you do you have to use a primer as base....on everything. I suggest a face primer, eye primer, primer for your lashes and your lips. For your face, MAC has a Prep+Prime Skin, but I just saw that they also carry one with SPF 50 -- very necessary if you're marrying outdoors. Prep+Prime Eye and Prep+Prime Lash for your eyes and lashes -- but any of the dual mascaras that you can buy in the drugstore can do! Though they carry Prime+Prep for lips, I prefer using a neutral lip pencil color to cover the entire lip before applying your lipstick or gloss -- it does wonders!. I've never used the midst the ladies have suggested, but I've read that it definitely seals the deal.
If you buy $50 worth of makeup at MAC they'll do your trial for free. I say try it out when the counter opens and see what your face looks like by 5.