I am 2/5 done with creating a mod that adds Imperial Border Forts to the following passes in Skyrim:
Jehanna Pass (to High Rock) Imperial (or militia) control No opposing gate, as cave is collapsed. WIP
Elenhir Pass (to Hammerfell) Imperial control Hammerfell opposing gate DONE. [Also has Caravan presence]
Pale Pass (to Cyrodiil) Imperial control No opposing gate DONE.
Rift Pass (to Morrowind-Silgrad) Stormcloak control Redoran opposing gate WIP << Working on right now!
Dunmeth Pass (to Morrowind - Blacklight) Stormcloak control Redoran opposing gate WIP

I have created Imperial Fort guards, and Stormcloak guards should be no problem.
I used Alik'r fighters for the Hammerfell opposing gate.

>> For the Morrowind factions (from Lore I believe House Redoran would control these passes to Skyrim), what Vanilla armor should I use?

When Dragonborn comes out I might change to Dunmer armor types available then, but for the first rendition of this, the initial offering, will be vanilla armors.

Thanks!!

P.S. This will be part of my mod below, as it deals with the caravan route into Skyrim being cleared. If it is not too much trouble I probably will also release it separately.
The barrack tower in the fort makes a handy player house under the right circumstances