when we went, our DSs were just the same age as yours! 2 & 4. we were deciding on the 3/4 or 4/3 land & sea vs 7 day. and we thought our boys would be so exhausted, rushing from one park/place to another. really didn't want to tire them out. all that walking, waiting, etc at the parks. and they still took naps at the time. so we opted for 7 day cruise. and we said we'd be back for wdw on another vacation, when our DSs are a bit older & can enjoy the parks more. and can "tolerate" much more.
anyways, we are glad that we did the 7 days. our boys really enjoyed it! we all did! it was very relaxing.
that was our decision. obviously, you know your kids. we just thought it would've been too much for our boys, at the time, if we did the land & sea. i'm sure you'd get other opinions, as well.
as for excursions, your kids aren't too young. our DSs loved the trolley ride. visiting the aquarium was fun for them, as well. we did western. there are excursions that kids your age can go on, i know, cuz we were able to take our DSs. double check the excursions' age. most says 3, but i think that's for paying.
whatever you decide, i'm sure you'd all have a great time! after all, it is a vacation, with your family!! enjoy!
