Activity for Army Wife, Navy Sailor

So I dont have a theme for my wedding so i figured that what every i see and like i can go ahead and find a place for it in my wedding. I found these and thought they would be cute to go with my desert bar. figured i can put labels on them and doll...

so how many favors should i get for a guest list of 65. better yet what are some favor ideas. i am thinking of getting a 4 tier favor cake just dont know what to put in the boxes