I agree with Ribwizard, work from the ground and make sure it is a workable height. When it comes to construction Ribwizard is the man, I look at it from a catering Chef view. I personally like a RF smoker with at least a 40" diameter. With proper tuning you can have multiple temp cooking zones and 3 shelves.
Color wise I would do the camo/military theme. I have seen some paracord that has fall colors digital camo and it looked very nice. I think it was black/red/grey/white, I will see if I can find it and post a picture of it.
Just my $0.02
I would put all of my work station stuff on one side of the trailer and the storage on the opposite side. This way you can position the trailer where people see the cooker and you. Then all the storage and usual mess is on the back side away from sight.. I know most comps have power, but it is also a good thing to have backup.
Grey and potable water tanks along with a 12 volt water pump. They have some that are pressure switched that whenever you open a faucet or hose sprayer it turns the pump on. Also hot water for your hand sink and dish washing. There are instant hot water heaters that run on propane.
Work tables and tent. I would use folding tables with PVC pipe to raise the table to the workable height, maybe 3 or more to start with. A tent with logo, something like a 20'x20' with removable sides. With this size you can cover the smoker in bad weather and still have room to work.
I would go with LED lights. They draw less power and seem to be more durable, they are also much easier to run off of 12v power. You can also get solar charging panels to keep the batteries topped off.
Just a few thoughts.
Edit:
Sorry the colors are black/grey/red/brownish red
http://www.paracord.com/550-Paracord-Fall-Camo_p_41.html
I know links are bad, but not able to post the picture from an iPad......