Just a quick question. I am now attempting the Anvil of the Void quest and as usual I always have Shale and Oghren in the party because they have relevence to this quest.

I like to Wynne in the party because I need a healer obviously. But also need Leliana who is my lockpicker.

My question is that is there portions of the deep roads quest where I can still go back to switch party members for an upcoming boss and/or are there areas that I can switch party members? Or is there point of no return moments in the Anvil of the Void level?

It's been a long time since I played the game so if you get better advice take that instead.

But I'm pretty sure I remember being able to freely travel back to town. Now it is called the "Deep Roads" for a reason and you will do a bit of backtracking (there's not much in the way of quick travel down there). But it can be done, as far as I remember.

I think I remember one "mid / late" level boss that might lock some areas - but I don't think that affects your ability to go back to town and swap party members (as long as you don't mind the hike).