How much does a druid need to "enter" a tree to activate the spell?
Example. Could a druid in earth elemental form put his hand through a Wall of Stone using earth glide and have his arm "enter" a tree (from a feather token) with his other hand touching his comrades, and trigger the spell transporting his group to safety (hopefully)?
Second question, is there any magic that brings a character's party next to him for such an evacuation scheme?
Thanks