Out of curiosity, when you mention the access pathway, are you talking about the usual exit which is to the left of the Coke building? Because I noticed something peculiar in this photo Bioreconstruct posted...
To the immediate left of the Simpsons ride and right through the clearing of trees is a beige pathway which looks rather neat and new. I can't help but wonder where that goes, since if it can connect to that backstage path, I think we might have figured out how they're doing the exit for the new tents. The older tents could use the usual exit path, and the new tents could be diverted down that new path which dumps out in the Simpsons ride plaza. (Or they could put all 4 there.)