In the meantime, I've been working on making the backpack fully complete, and with the addition of clips and such for my radio, GPS, and cell phone, I think I've got the makings of my full nav/com package, along with room for a backpacking tent and sleeping bag, if not a ridge-rest or therm-a-rest. I've even got a pillow in there! My SAR bag is ready, and, I think, so am I. Now I just have to be sure to pick up my maps and Bryan's gaiters at work tomorrow...
And yes, that's what I made today: modifications to my backpack.