I took a slightly different approach to a 'go bag'... I created a station in a box..
I have this wooden box with a nice hinged lid.. about the size of a medium suitcase.. no idea what is was for.. but I have it now
in it I packed:
a Motorola MaxTrac 25w VHF radio. (It was what I had laying around, and they're tough as nails)
a suitable power supply, initially I used a 7A linear.. but that was REALLLLY heavy.. I'm going to trade it for a switching unit later. (the MaxTrac needs only 5A on transmit)
I also packed in (4) 6v 11aH sealed lead acid batteries, wired in series/parallel for 12v.
I included an INTELLIGENT maintenance charger.. the type that cycles on and off.. NOT a float charger. (I've had those sealed batteries explode on the bench from a float charger)
i attached the charger, and a 12v courtesy lamp meant for a car to the inside of the lid, so I have a work light.
I wired the p/s and batteries through a series of toggle switches..
Mains and batt..
mains on, batt off.. normal operation..
mains off, batt on.. normal operation on the batteries
both on.. charge the batteries from the p/s.. though risky w/o regulation.
all the power was wired through a 4 position automotive type fuse block.
one fuse for the radio, one for the light, one for the cigarette lighter jack, and one for the banana jacks I included. This way I can connect other devices, other radios, whatever the case maybe, OR, I can turn off both power switches, and wire an external power source to the banana jacks. and with the fuses being ATO type, (your basic automotive blade type fuse) while not recommended, if a fuse had to be replaced in a pinch, a short jumper wire with flat blade crimp on ends will work...
Then I have a Radio Shack scanner antenna that's resonant for transmit on 2m and 70cm.. when I unscrew the ground radials, it stores very compactly.. and I keep a 25ft length of RG58 coiled up in the box.
while it IS extremely heavy.. I took a slightly different approach to 'portable'. my intent was to be able to go somewhere, flip the lid open, set the antenna up, plug into power if it's available, and sit and operate.
portable is a relative term.. this thing can be taken anywhere.. but I wouldn't wanna be hiking very far on foot with it.. I actually plan on permanently attaching a luggage carrier to it.. to keep it on wheels
I also included an automotive Ammeter and volt gauge for monitoring battery life
i've never really had the patience to test the batteries to capacity, but I figure on anywhere from 24 to 48 hours on the batteries, depending on duty cycle and other current loads (like using the light which pulls a couple of amps on its own... i think it's time to consider an LED replacement to the incandescent)