You have to remember is that bloodmoon and tribunal are two different expansions and one doesnt affect the other.

Sleeping in a temple has nothing to do with starting it.You can start a new game with tribunal on and just go to sleep right away and still be attacked by the assassion.Ive tryed that many times without fail.As for getting to solstheim its as easy as a boat right,or just swimming all the way their,though keep in mind it'll be a long swim!
