I've been dreaming about the same thing with my nonexistent future trailer (if only I had something with hauling ability).
I basically want it to look like this one
... maybe it'll offer some inspiration for you too.
I really like the fold-out bench/bed that sits on the wall. If you like it, look here
I also like this trailer
built by 1000RR and like his use of resin cabinets, since they're light and cheap and give nice working surface. How long is each leg of your "V" when you measure it? Would this cabinet
fit? Obviously not heavy duty, but you may not require that.
Also like these helmet bays
Lastly, in case you haven't considered it, instead of E-track, consider L-track and get a Moto Cinch instead of Pit-bulls. It's half the price of the Pit-bull and will support a wider variety of bikes without buying pins, etc. It also takes up less space, etc. The only negative, is that if you drop the bike and lose a foot-peg, you'll have to strap it down a different way (not a big deal, just put D-rings in the L-track and secure with ratcheted tie-down).
Hope my dreaming helps with your reality! Good luck with the trailer, I'm sure it'll be great.