I have been fortunate enough to take my daughters many places from NC Outer Banks, Tampa, San Diego to Hawaii. Our recent spring break was spent in Charleston SC, Folly Beach and Isle of Palms, they loved it! Highly reccomend it. So far as shooting, I started them w/ hand guns at 10 years old, I believe females train very easily as long as you start them with small-caliber and work up. They have both worked thier ways up from .22 to .45 and .357. My oldest has recently commandeered my baby Glock! I wish I had a dime for every meat-head I see at the range showing his girlfriend how cool his .50 cal hand-cannon is. Too bad he cannot maintain anything below a 16" grouping and his girlfriend is terrified to even hold the weapon! I have to laugh when my 14 year-old is knocking the centers of her targets completely out and El-Dorko in the next stall can't hit the black twice in a row even with a Nancy-boy lazer attached!
I beleive we were all put here for reasons, one of yours was to do what you are doing and taking care of those beautiful girls (all 3). You will certainly be rewarded for that!