Where are the Followers of the Apocalypse exactly. I'm looking forward to joining them, but beside their Outpost near REPCONN and their base in Old Mormon Fort I haven't found any trace of their presence in Mojave.

Can somebody pinpoint their location on the map for me. Thank you.

Their main base, AFAIK, is the Old Mormon Fort in Freeside.

They aren't a faction you can really join; but you can help them out.

They don't even have their own unique uniform or faction relation system; they're kinda just part of NCR (make NCR made, Followers get mad too).

Hmm, I was interested in obtaining the key for Followers Safehouse (on the path for Jacobstown). I thought by getting enough rep. with them, they would give it to me. Guess I was wrong. Thank you

There's nothing of value in the safehouse, and you shouldn't need a key to get in anyway; when I first ran across it, it was opened.

Maybe it locks at night (I arrived midday)? There wasn't any named NPC around there; just a bunch of "Followers."

Your wrong and you confuse the followers safehouse with followers outpost. Inside the safehouse you can find a medicine skillbook.

They have their unique lab coats as a uniform and they definitely have their own unique faction. I can't verify if they have any spillover from NCR, but they really shouldn't.

Well if you do Veronica's quest you will get a chance (or dialog) to ask to join them. Problem is the doctor to talk too is out and won't be back until tomorrow (what you are told). What is waiting the next day isn't an invite to FoA.