So I have been thinking about doing this for a while, but finally got the parts to pull it off. I wanted to leave everything functional by itself and still use the cable when I use my tripod based ground station, so I made conversion connections for everything.
I picked up several used Futaba mini square trainer plugs and hacked some old RCA cables to plug into the RC 305 rx the usual way. Nice and compact and both powered off a 2s 1200ma lipo. I am going to make an attachment for the Lawmate 1280 rx and use it the same way but with a 3s lipo and regulator to run the goggles on 7.4v.

Going to test fly with the Slow Stick on 5.8ghz omni antennas this weekend.

I got a chance to fly with my mobile goggle setup this morning with the 5.8ghz CP antennas and the Slow Stick on 200mw and I had a blast. What freedom it is to not lug around a tripod and deal with the base edition cables. It worked perfect and I did not even notice the extra weight on the goggles.

Nice setup! You don't have a problem with the added weight to one side of the goggles?

I don't with the 5.8ghz gear, but my Lawmate 1280 Rx and harness is heavier. That one I am going to attach to a ball cap or visor to take the weight off the goggles.