With regards to the breastfeeding in public, I've breastfed in several states, including those without laws protecting a woman's right to breastfeed, and have had no incidents.
If you are in a department store, many of them have a room inside the restroom where you can breastfeed without any spectators. I've met other mommies there breastfeeding their LO.
I've breastfed in the airport in the security line with my sling, in malls, restaurants, food courts, inside cars, parks, beach, etc.
As someone previously mentioned, buses are not so fun over here. NY has a train, Amtrak, that goes up and down the coast (and other places), but it's almost as expensive as airline tix. Places aren't as close as they are in Europe so keep that in mind. If driving, keep in mind tolls, as they are pesky little things that pop up frequently.