No, unfortunately, your friends will have to be content to sit in their own not-as-cool garrison if you are offline.

Please log in to rate this.
people found this helpful.

Blizzard stated at Blizzcon that you can have a full 40-man raid visit your Garrison if you’d like.  I can also imagine this will put a bit of pressure on Raid Leaders to have a wicked garrison, since you know fellow raiders will be checking it out

Please log in to rate this.
people found this helpful.