Can't wait for iOS to have the deniability factor of having different passwords unlock different things :)
For the sensitive stuff, have periods of time that require several computers to solve cryptographic challenges in order to unlock the phone. Some of which may be your friends' devices. If they don't hear from you and your intended hosts in a certain amount of time, phone stays locked.
Or one of the devices can be an NFC or Wifi hotspot in a certain area, and one at home. If you don't reach it, phone stays locked.