For release, till our battlekeep is ready, I think the best is to have all our toon unguilded : capital cities are good to farm the gold we'll need, and without a guild no guild-at-war problem.
We just need 2 toons guilded : one in the capital city who put the farmed items in the clan vault, and the other in Cairn (first to claim the city, then to put the bank up).

[Linked Image from w3.the-kgb.com][Linked Image from w3.the-kgb.com]