I think part of the reason why people tend to stay at the Colibri camp even when it's massively overcrowded is because it's so hard to get back to Whitegate once you're there. Your options are: A. Get someone to D2 you, which isn't really an option because no one brings a BLM to a bird party. B. Use your warp cudgel/scroll and lose cooldown/IS/CP/money to get back to your HP. C. Have someone tele you out of there, OP to a city, and warp back to ToAU, again costing you money and time. Or D. Have someone escape you from Halvung, then run to the Mt. Z runic portal (except there's probably no one in your party with escape and even if there was it's still a long run back, plus the cost of oils/powders for the run). If it was easier to get back home, you might see more people showing up, taking a look around, seeing that the camps are full, and saying "Screw it, let's go somewhere else." As it is now, most people probably don't want to go home empty handed, so they stick around and try to drive the other parties out instead of eating their losses and finding another camp spot.