Power to shed

Would like to run some power from the garage to my shed which is about 2o feet in distance. No plans on plugging in heavy draw equipment. What size wire would you suggest I use.

I assume you want 120 volts, not 240. Seems like 20 feet always turns into 35 feet when you account for the actual wire routing: up, over, down. Also, always use larger than required wire on long runs to minimize voltage drop. I'd run 8AWG copper wire direct from the breaker panel and use a 30 amp circuit breaker. Then you can run pretty much anything you want, including your trailer.

I agree with both bhamster and Seanl. however a check at the local home center at the price of a 50 foot coil of 8/2 will have you purchasing the 10/2- and still choking when you check out at the cashier. I just did the same for a new parking spot for the pod.  About 20 ft run, used just about 35 feet of cable.  I had a length of aluminum power cable from an old above ground run to the barn that I used to support the cable. I Use 10/2 with ground UF which can be buried or strung overhead.  I used cable ties to fix the two wires together and constructed strain relief using some cable clamps on the alum support.  This is powered from one leg in  a 30a 240V box to a 30 amp outdoor box mounted next to the trailer.  Unless one is going to run the AC on the pod, there is really no reason to go to even a 30a box, as the lights, fan and converter don't draw but less than 10amps. 

Thanks for your replies.