I've typed this out a few times but it's confusing so I'll try to explain it correctly..

I am planning a local regional map of a cluster of towns at the foot of a mountain range, with a smaller inset map to show the wider area.
The alignment of this wider area is already set out in another map, where the mountain range is shown to run North-South.

I had planned to do the map in normal 1920x1080 and so was trying to get a handle of the layout I'm going to use. It seems easier to have the main mountain range run visually left to right on the map, rather than top to bottom. However, this would obviously mean my North arrow would be facing Horizontal in the main map, and Vertical in the inset.

This is for a DnD campaign I'm running so will be used for players to reference and listeners to my podcast. What is the thinking around North directions on maps with an inset map. Should they always match? Would this be too confusing? Should I just change the ratio of the map? I haven't done a non-standard proportion map before...