Also, if you do the "rock ring" thing, you get a nice little bonus. You can get up on top and just plink at the foes to get bow XP and get drops whens its all over.

Even better, you can use this to load up your obsolete arrows and use them to get rid of them.

Mind you, this will get tricky with troll and swamp sieges: the trolls will simply smack you (they're tall and can probably reach you) and if you get some Draugr 2* archers, you're better of hiding, because they'll hit you hard.