If you live in the country, you have the benifit of being able to play it in your backyard, but in the city, you have to go to a designated place for it. It's not really one or the other, if you see what I'm saying, but if I had to pick, I'd say country.
Park City already has a few sites and areas for paintball. If you google "Park City Paintball", a list of sites will come up.
There is no such thing as high voltage paintball guns.
The United States.
There is no place in the US that requires a permit/license for paintball markers.
America has the most paintball teams, as well as the most world cup wins
The best thing to do would be to take him to an established paintball facility, where there are referees and older players.
The United States of America.
well the first thing is he should be wearing a paintball mask
no such thing in Pokemon only regions or town or city
Hopper or Loader
Yes, there are many indoor places inside the city, there are a few in the outskirts of the city as well.
It is Illegal to play paintball inside city limits, unless you are at a legitimate field or have a large (enclosed with proper net) private property.