@Mame,
With you going back and forth to Bed-Stuy, yes, get both.
RE: the museums. When you go to purchase your tickets note that it says SUGGESTED Donation (or something like that) so what you do, if it's $25.00 each say, is put Thirty Dollars on the counter, look the cashier in the eye and say "Two, please."
They will give you two tickets.
That doesn't work for the Special exhibits, those everybody, except members, have to pay full price.
You know, you could study the city this weekend, decide what neighborhoods you want to see (Chinatown, The Village, Battery Park, whatever) and you can go to all of them by MetroCard.
No bus needed.
We can help....send us a list.
You take the subway to the Museum of Natural History, for example, and then take it further Uptown to the Cloisters. (C train and the C and the A train)
or go downtown to the World Trade Center.
Make a list.