Hi all!
Sorry for the silence and TY for the suggestions!
I'm actually running 1e/ AD&D but am very flexible with using ideas from any edition that fits my style.
The aim here is to streamiline & simplify the process. Esp. with regards to spellcasting & affect on magical items, etc.
My players have never really ventured into the ethereal plane. They're long accustomed to land treks, dungeon crawls, resting/ taking watches in shifts, etc...
I have an adventure in mind where I want about 2/3rds of it to take place within the ethereal plane (including the deep ethereal), in...