No pics ('cause my setup is long gone) but just noting a few things -
1) You can never have too much room. I and my race partner used a 7x16 enclosed. Pulled it with a GMC 2500 5.9l Vortex (gas). Still have the truck.
2) You'll find you'll need to carry more stuff than you ever thought you'd need. If it's for racing (and not just a few track days), you'll need room to carry spare wheels, spare tires, multiple toolboxes, a canopy (we had an 10x20), generator, spare body work, a couple of boxes/crates for spare parts, some chairs, a portable table or two, some kind of flooring (we spread an indoor-outdoor carpet cut to size under the canopy), room for a couple of coolers/ice, a work bench to roll a bike up on (for ease of wrenching), tire warmers, 5-6 electrical cords, gas cans (I carried a couple of 5-gal metal cans), oil, grease, cleaners, rags.......the list goes on and on.
Yeah, it's possible to squeeze all of it into a smaller trailer. But at the end of a race weekend when you're tired, it's hot, and you're faced with 5-6 hour drive home on a Sunday night, the last thing you're wanting to do is spend any time packing a trailer. You just want to get everything torn down, loaded, and get on the road. That's when you appreciate the extra room.
