Leave a letter, leave details
If you BASE jump, make sure you leave a letter of your wishes, details on all contacts of your family (even if you dont keep in contact yourself - this is most important), details of where wills are held, who to contact, what the fuck to do next. Without these things, its fucking hard trying to get things done. Its expensive, its not fair, its a fucking horrible thing to search and sort out without any information at all.
BASE is something we all know the risks of taking part, but there is no fucking excuse in not having everything in place to help everyone afterwards.
Get it fucking sorted now....