I have been working on a Get-Home-Bag (GHB) to help me get from my office to home in case of some large-scale emergency. Currently I am living in Washington state and work in downtown Seattle. From downtown Seattle, I am trying to make preparations so that I could hike to my home up north in the town of Lynnwood. To get to/from work, I commute by bus. Via bus, the distance from work to home is roughly 18 miles. According to Google maps, it could be anywhere from 17-20 miles if I have to walk.
[..]
In the Seattle, WA area, I consider the most likely large-scale emergency to be an earthquake. [..]
17-20 miles would be a long way for me. [..]
Hi Wolfepack. I live in the Mill Creek/Bothell area and work downtown as well.
I've made similar provisions, with the exception that I carry the bag with me as a EDC.
I'll take a look at your stuff and make comments a bit later, but here is my kit (photos need slight updating). This is an evolution of several generations of kits, and I change the included clothing slightly depending on the season (summer gear pictured).
http://navitsky.org/kit/v6/[Note, the objectives of my kit are *slightly* different than your stated reason. My kit is EDC for one. It is certainly a get-home bag, but basically it is also intended to deal with being stuck at any random place at any random time for a couple of days, bag. In most cases, that isn't a life or death thing, so convenience comes into play.]
One comment I will make off the bat is I don't think people appreciate how bad 20 miles could be if it is strewn with debris from an earthquake.
I share your opinion that hoofing it is the likely result and it will take a fairly long time to traverse.
-john