When to give XP for Haunt

[Mark_Twain007]

I recently ran my PCs through a haunt from book 4 of the Skull & Shackles AP that summons some ghosts each day to assault a fortress they were exploring. They defeated the ghosts, but they did not destroy the haunt. Those ghosts are coming back tomorrow (Haunt is destroyed by destroying a cursed magic item).

The haunt rules say they get XP when they survive a haunt. Does Survive mean defeat, or make go away, or does it really mean they survived 1 encounter with the ghosts, they get XP?

[Ratnap]

Consider a haunt as a trap that can reset itself. So yes, after surviving that trap you get to have EXP.
However I would discourage my Players to just sit in that mansion and fight the ghosts over and over for Bonus EXP :x

[Ascalaphus]

I'd say that making it through the first encounter is worth XP - you are experiencing the haunt, after all. Encountering it again, not so much. Final destruction could be awarded with story/quest XP.