If nothing in the agreement says that you can't take her out of state for a vacation, then you can take her. The point of advising him of the trip is 1) to give him a head's up, and 2) allow him the opportunity to go to court to obtain an order stopping you from going. He'd have to have very good grounds to stop you from taking your daughter on a vacation for a few days. Does your agreement say anything about vacations? That would be my only concern is that he could accuse you of interfering with his visitation, although I doubt the judge would sanction you. You might want to clean up the agreement at some point to make sure it provides for out of state travel and vacations.
I can be reached at 714-442-1522 if you have further questions. Before accepting any answer as a final answer, you should have your case reviewed by an attorney. No attorney on Avvo has read your paperwork and therefore cannot give a completely valid answer suited to your case.
Sign up to receive a 5-part series of useful information and advice about child custody law.