some advice--just agree with everything she says for the wedding. most women dream of this day since birth, so within reason, just agree with ALL her plans--most women will have an idea for every aspect of the wedding, and all you have to do is arrange for the tuxes, and possibly arrange the honeymoon.
for honeymoon, depends on your budget. you can't go wrong with sandals resorts. most include meals, booze, and other entertainment.