@ LizT: I have gone for one bridal makeup session so far at the Channel counter (which turned out horribly as my makeup was way too dark and dramatic!) and the only tips I've learnt so far are that we shouldn't wear SPF on the wedding day, especially in our foundation, as it's really bad for flash photography. And that on the wedding day, or the night before, we should do a mosturizing face mask so that our skin is beautiful for pictures. If you need to use some SPF, only a small dab should be used.
As for makeup, I'm going to do my own makeup. I don't trust the ladies at the salons in the DR and have heard to many horror stories. You should totally go to the MAC counter and get some tipsadvice on how to wear your makeup for the big day. I'd say don't bother booking the makeup session (in less you really need it) because they will charge you $55.00 (that's here in Canada) for the 1hr session, and you only get a mascara out of it. I found that expensive considering you're going to be buying all that makeup afterwards. There is also Sephoras!! I love that place, all the makeup brands in one store! You can't go wrong with them too!!