Carry places: no schools (including universities. Driving through is ok, but parking there you'll want to avoid), no places where court proceedings are held (AFAIK you can carry to go pay your vehicle registration, but not to the actual court room), and any place that has has a sign (carries weight if law unfortunately). Everywhere else you're good to go, but almost all hospitals have signs.
Ammo: I think common sense applies here. We have no restriction on hollow points or anything, but carry with incendiary rounds will be frowned upon
There is no duty to inform but you do have to show your permit if asked for it. It's tied to your DL# so if you're at a traffic stop the cop will know you have a HCP and it's illegal for you not to have it on you when carrying. So if you're ever detained the cop is eventually going to find out, so it makes sense to inform early.