Go to Radio Shack and get a "cigarrette lighter" adapter. Cut one end off, then add connectors like Sermos or Deans to the end. Add the matching connector to your charger, then you can plug it into the cigarrette lighter on your way to the field.

By using connectors you can also put a matching set on your alligator clips and still use it with a 12 volt battery.

Then buy a pair of 6 volt RC car battery packs and wire them in series. You can then attach them to your starter and be "portable". Of course this will require a manual fuel pump and glow igniter with a battery, but you also get rid of all those cords, and you won't need a power panel.

The 14.4 volts supplied by the 2 "car" packs will provide a bit of a boost to your starter, yet will not harm it. (As long as you don't spin it over for 5 minutes at a time.)

If you have a charger capable of charging 12 cells, you can also charge your "starter" pack on the way to the field.

I've been set up like this for a while now, and I can leave everything in the vehicle for days at a time. Never have to bring anything into the house for charging. (One of my 12 volt chargers can also charge my glow igniter.)
Dennis-