I like the idea of a coverall! I volunteer on our local EMS squad and we have jumpsuits as uniforms. When I am on call for an overnight I wear Long-Johns to bed and when the pager goes off I have fire-drill response time. I am able to get in the jump suit and out of the house only sllightly sloweer than it would take me to get out naked (which is the way I prefer to sleep.
The jump suit has a uniform garrison belt, larg front and back pockets at waist level as well as two large patch pockets on the chest and large emt type cargo pockets on the legs and upper arms. This thing can hold more gear than many day packs would. I carry my EDC whenever I leave the house. This includes my PSK and my peersonal FAK and my wallett and a few other things. Having a fully loaded jump suit hanging nest to the bed might be considered odd by the casual observer but If you have to bail out the window because the hall is in flames and it is two in the morning and your naked then you might be glad to be putting on your fully loaded lined jumpsuit while you stand in the snow on some sub-zero night in february.
I guess it is all about scenarios and layers. If I am anywhere that I have driven then I have my vehicle survival kit and my EDC which, when combined constitutes a fairly decent BOB. If I am at home I have a 4X4 and a bunch of other stuff in the shed that would be stuffed in the 4X4 if TSHTF. If I am asleep and naked and fire alarm goes off for a real reason then I am probably not interested in the basement full of optional stuff that would get attention in a SHTF scenario where my BOB would be important. My bedroom is somewhat small and filled quite nicely with my wifes stuff so I am not going to keep a fully loaded ruck-sack anyway near my bed or even in my bedroom. But I can keep a fully loaded jumpsuit in my closet or even hanging by the bed (until I get too much greiv from the wife.)
So. In a SHTF scenario that I discoveer while at home, I change into the Jump-suit since it is the most multifunctional item to wear and it contains all my EDC stuff. Put on my Gortex outer layer, go down to the basement and get the guns, ammo, extra water and fuel; go out to the shed and grab the base-camp gear; throw it all in the 4X4 and hit the road. Thhis is the SHTF bob scenario. If the mob of angry villagers is already marching through town then I will probably only grab my shotgun from the basement my ruck from the shed and hit the trail.
It is all about scenarios and layers.
In a natural catastrophe evacuation scenario I will probably take the time to load the 4X4.