OPSEC and written plans

So I'm getting together some written emergency plans to have at the house, in each car, BOB, and even in my wifes various purses. She isn't super interested in this whole thing (she's supportive and pays some attention, but I know if the SHTF she may not remember as much as I'd like) so I would like to have written plans available for her and the kids.

These plans would include things like meetup locations, routes, BOL's, contingencies, etc. I am a bit worried about these plans being written down though and then available to unscrupulous persons who may stumble across them if one of the written plans got left behind.

When I was in the army we used to have OPSEC plans in place for when a vehicle needed to be abandoned. (Stack any sensitive materials, radios, computers, documents, maps on the front seat and drop an incendiary grenade on them as run away. Or as happened during the battle of Baghdad, have the AF drop a JDAMS on a disabled tank) I don't think that covers every situation though.

I'm just curious if anyone else worries about this and if so what are your solutions to OPSEC for written plans?