So I was searching White Ridge Barrow for some notable loot when I came across the Imbuing Chamber. If you walk across the bridge there is a ladder that leads to a shack right outside the barrow, thus with instant acces to Solstheim. This looks like a quick way too make some Spiders and get back outside.

However, the gate to the shack requiers a key to open, and I can't find it on the Scholar's body. So if anyone knows where the key is, I would be happy to here it.