Macedonia campaign setting???

You won't be able to find much information on Macedonia before Philip II anyhow. The Greek historians didn't pay too much attention to them before that time.
Lots of savage tribesmen beating each other up? I guess there's room to put in anything there...
My main point in all of this would be to take the basic historical points and what the technological level would be for the most part, etc then have fun with it. That way down the line people would not say "well you see that certain item was not around till...or that wouldn't have happened because.... it would be FUN and FICTIONAL. Not historically accurate.