Hi, I'm Captain ... uh... Goshdarnitt from the Burning Man site.
I've been using the little Hondas for a long time. The first thing I have to say about them is don't buy the ripoff "parallel operation cables! If you open up a Honda and check into it, the parallel operation ports do nothing but connect directly to the generator's 120V outlets. You can accomplish the same thing by simply plugging two Hondas together with a cord with a male plug at each end.
You need to have them connected before you start the engines, but that's true with the Honda parallel cables as well.
I like to use two 12 gauge power tool replacement cords (from Home Depot) wired into a junction box holding a 30-amp RV style outlet and a regular dual 15-amp home style outlet.
ilynne.com captain goddammit
is the link to my instructions for making a simple external fuel tank for a Honda EU2000. I wrote that a few years ago and have since decided that while it works, the method I described for attaching the fuel line to the gas cap could be improved.
If you use your Honda in one place for any extended amount of time, you really want an external tank! It does several things for you. First, you aren't having to constantly refuel. Also, you don't spill gas all over your Honda while fueling! It's hard (I find it impossible!) to see through the strainer under the Honda's gas cap, and you can't tell when you're almost full and about to spill.
You can keep your fuel supply cleaner too, since you can put a fuel filter in the external tank's hose.
While at Burning Man I use a 50 gallon truck gas tank as my supply, and never refuel the gennies at all!
This external gas supply system works best if the extra tank is at the same height or above the generator.
I'll say that the convenience of an electric-start permanently mounted generator is really great though!
The earlier-mentioned plan for a hitch-mounted cage for them that allows operation on-the-go without unpacking them and finding a place to set them is a good one. Every time I've used mine on the road I've been pulling a flatbed trailer and simply carried them back there and ran a cord (well protected and secured!) up to my rig.