Well, if the truck just left, anything they see. But if its been a few hours or days then a little refinement may be in order. Let's consider bait first. They work well but my guess is that much of their popularity comes from their convenience. However, if you choose live baits your by-catch may be as interesting as the trout.
Shiners are good for attracting pike type fish as well as some of the bigger holdover browns.
Whatever you are using, except for the shiners, fish right on the bottom. Add just enough split shot or a slip sinker to cast to where you want and prop the pole on a stick. That's all it takes and now you can stick your hands back in your pockets for warmth and talk to the other folks out trying their luck. If you like to cast lures you need to think small. Spinners are often one of the best choices.