The first Falcon Heavy launches will be from Vandenberg AFB, CA. The Falcon Heavy is able to insert ~12 tons into a Geosynchronous Transfer Orbit (GTO) launching into a polar parking orbit. The Delta IV Heavy, launched from CCAFS, launches approximately the same amount. Put another way, it easily competes with or beats all other launch vehicles in mass to orbit without the benefit of an equatorial launch site.+Mike DeSimone
, the Falcon Heavy is due to launch next year, while booster fly-back is still a little ways off. I think the intent is to do the fly-back from all launch sites. The Commercial Launch site (vs the two USAF controlled sites) is driven partially by the ability of the Air Force to meet SpaceX customer demand.