I'm planning on doing trip to New York mid June. My spouse and I will be doing all the touristy stuff, but I am definitely bringing my camera gear. Are most of the tourist spots in New York (Manhattan) OK with people wearing backpacks? Any issues I should be aware of? Will it make it too hard to walk down the sidewalks? I do have a UD35 that I'm going to try bringing too, but it normally just kills my neck and back after wearing it for a full day. Thanks for any tips!