This is almost spot on, but the GHB 2020 restrictions apply to wyldwoods that are set up during the battle, as well as the first wyldwood that is set up before deployment. The Sylvaneth FAQ specifies that summoned wyldwoods are not subject to GHB 2019 restrictions, but that FAQ wasn't updated after GHB 2020 was released. So we've got three sets of restrictions, and the GHB restrictions stacking with the other two...
First Wyldwood: More than 1" away from terrain & enemy territory, more than 6" from objectives
Summoned Wyldwoods: More than 1" away from models, terrain features, & objectives
GHB 2020: More than 3" from other terrain, more than 1" from objectives
Put them all together, and you get the following placement restrictions...
First Wyldwood: More than 6" from objectives / More than 3" from other terrain / More than 1" from enemy territory
Summoned Wyldwood: More than 1" from objectives / More than 3" from other terrain / More than 1" from other models
