that's probably the quickest and most direct route. i was going to suggest Lafayette street, but i think it's a one-way heading north and probably not useable for that reason (on your way back it might be a good idea). broadway is busy, but if you can handle 2nd ave - it's not much worse than that. personally i would meander down allen street (further east) and zip zag over to city hall park, but if you don't know the area it might get confusing and you risk getting lost. anyway, i'm not saying much here at all...i think your route is the best.