Trout are very light fleshed, and flakey. This is tough to grill. I would suggest maybe broiling instead if you want to go that route. For the most part, light breading, and baking or frying are about the easiest ways to prepare Trout.
One thing I have done which is a little bizzarre, but tastes awesome is to bury prepared pouches in the coals of a came fire. You need heavy grade foil to do this. Just put in lots of butter, onions, mushrooms, peppers, garlic, and any seasonings you want to use. Seal this up in a foil pouch, and bury it under the coals of a campfire fire before you hit the hay. The next morning, just pull the packets out, and eat them. Works with raw hamburger or steak(add potatoes to those) too. Really tastes amazing! <,"}/>{ Rippa