I only tried once, and figured it was WAY too hard for the time being...

So, on the second isle, you have to clear out the southern watchtower. I went there, stayed back while the HUGE troop marched by, but somehow they still saw me. Needless to say, I ran like a little girl. Anyways, did I miss an alternate, more secretive route, or am I really forced to go up against tons of legion on my own?

Also, I roamed around completing all the other quests before I did that last one, but I couldn't find the path to The Platou Encampement just east of the Dragon Summoning Stones. I figured it was through the central cave, but when I went through and took the route I thought lead out to it, it led me around to the Dragon Stones again. I'll keep on searching, but if I can't figure it out, I'd like a bit of help so I can get through it quicker.