Thanks to Scanna, The Ghar Station has a full guide to the Dopey Opie puzzle. Scanna has graciously provided maps and multiple tips on how to get through, including pictures showing off the shortest path.

In addition to this, I have provided links to Keepro's video guide to the puzzle. Between the two, you should have almost everything you need.

https://www.thegharstation.com/2017/...le-dopey-opie/