i feel like no one is directly answering my questions : (...where do you get your best info, and off of IMDB how do you know which location to use because there are usually a few

That´s what I wonder, too..

where do you get the majority of your info for the production office?

production company's don't usually have a lot to do with the actual filming. you would need to find the production office. and i find imdb in general pretty lousy with their information when it comes to finding this stuff out

When I go to a movie on IMDB Pro, it always has like 4 locations for the movie being filmed. Should I call the production company and ask them where they are on what dates, and then send it there?Or do I send it to the production company as long as they forward mail to wherever they are on set?Really confused on this so please help. Thanks!