We visited the Mint with my Mom when I was 8 months pregnant and she was visiting from out of state. They do not allow strollers.
I used the Moby (yes... it's a pain) for a hip carry and a back carry for my then 15 month old because there was no way I was going to chase him all over the Mint with that big a belly but my Mom really wanted to take the tour.
Not something I would do daily but it worked in a pinch when strollers were not allowed.