Questions Linking Contacts to Locations and Locations to Projects

Since it does seem that Contacts can be linked to Locations, I was wondering how everyone else was getting around this hole in Acumatica.

We have Customers with multiple Locations and multiple Contacts. We would like to see the Contacts that are at each Location, but all we get is a list of each in separate tabs that aren't linked in any way except for at the Parent Company. How do you see which Contacts work in one State (Location) vs another State (Location). 

Also Locations can't be made a part of a Marketing list or Campaign...or a Project. If we do a Project in one State (location) we want to tie it to that Location do to Billing, Shipping, etc.

Am I just going about this the wrong way?

Thanks for any input.