G-D Bless You if you travel anywhere with 5 kids under 8
Posting here would probably get you more responses.Most of the major attractions are wheelchair accessible so no problem with a stroller (other than the pain of taking it in and out of the car so many times), if you bring some kind of carrier that would open up those that are not wheelchair accessible but just only few stairs or a short walk. Other than that bring lots of snacks, drinks and entertainment for long times in cars and lots of sunscreen (high altitude sun can be brutal).