I have found that using a 1/2" drill with a 10" buffer wheel works pretty well around windows and detail like lights, and hinges. Basically you have to hold the drill sideways so that the wheel (with a little polishing compound on it) is perpindicular to the trailer, then with a little pressure, you can move it around the areas where a cyclo, or a normal compounder wouldn't fit. I try to do these areas first, then compound the whole trailer, and then last but not least, is the cyclo step to get out all of the swirl marks.
Good luck. It's hard work.