The Synodiporia Psychic Network

Okay, if there's a big climb-the-mountain fest going on, I have a very important question, before we split the party and possibly end up scattered across a country again.

How many folks can do remote portals, and can someone explain the trick to me? Last thing we need's another Bando where there's only two people who can do the thing and we need to regroup in a hurry.