There have been numerous threads with people asking how to achieve all of the survivors into going with Tavia. It seems as though people are starting their playthroughs over again to try and do things in the game differently. However, one question comes to mind if this is the case:
Should everyone leave with Tavia?
What I am guessing is in Season 2, Clementine will somehow stumble upon the gas station from 400 Days. Wether or not she will head to the survivor camp mentioned by Tavia or stay at the camp will be entirely up to how you ended 400 Days. What if Clementine gets to the camp, only to find that is is devoid of life? What if she finds someone ( Wyatt or Russell per say) to help take care of her as they journey to the camp?
Im considering starting another playthrough in which half of my survivors leave and half of them stay at the camp. Telltale really should have included a scouting option first. Something like "Part of our group will come check it out, and if it's legit, we will bring our whole group over."