Your sister just passed away? If so, my condolences.

I don't think I'd want any advance notice. My most risky endeavor is driving, as 35,000 Americans die in car accidents every year. Outdoor activities are a distant second. I"m not willing to give up either, so I make it clear to those who are very close to me how much I love them and how I would want to be remembered.
I could handle having two weeks notice but if I died on the way home today I think I'd have no regrets.