My character's RP in the SI is limited to exploring and a few side quests. After what she and Sheogorath did to those poor Khajiit in Borderwatch, Buffy is quite ashamed of herself and angry at Sheo. In fact, she will never lift a finger to help him again. She'd be perfectly happy to see him lose whatever silly crisis he thinks threatens him.
That said, she quite enjoys the place - she will simply never accept a quest from Sheo. Like you, she often stays at the camps spread around SI while exploring.
This works fine for us, because I have completed the SI questline using other characters in the past, so I don't mind.