I have the same question ! My situation is as follows.
I have done :
- The Ravaged Beach - Forgotten Chapel - Druid Grove area. So, probably almost all things east of the bridge to the Blighted Village.
- The Blighted Village (surface + cellar), the Goblin Camp (outside), the Goblin Fortress (only the level with the 3 leaders), and the camp celebration.
I have avoided as best I could :
- The Whispering Depth.
- The Wetlands.
- The Risen Road.
- The Underdark.
It was my hope that doing at little as possible outside the main path and stopping at celebration was about 50% or 66% of Act 1 (which apparently is just Act 1A, so that's great). Is that roughly correct ?
