Just to clarify. ALL the sites on adventure path are active on every turn (from Comprehensive rules "active" entry: "During your turn, only these cards in play are active: • sites on the adventure path(...)").
The only catch here is, that only abilities on current site (the site where the fellowship currently is) can be played (activated).
More specifically, from Comprehensive rules:
"Sites are always active. A site's game text cannot be used unless the fellowship is there, although some cards may copy and use that game text."