I've always thought, in regards to space around Redwood Challenge Trail for expansion, that Disney could do something quite simple. Right now two trails lead through the Grizzly area. One is the scenic route which takes guests on the bridges and up against the mountain and through the smokers area. The other is a direct route that we all know. If Disney were to have the plot of land Redwood occupies combined with the main walkway after the GRR gift shop, they would have enough for a well-planned D-E ticket. It might also make the wilderness area seem more expansive as you have to wander through it over rivers and against cliffs.