Dreaming that you're without clothes in front of a crowd or your peers is very common. I think it has something to do with our innate fear of being exposed and vulnerable. (Unless you ask Freud, who would probably tell you that you've got repressed sexual feelings toward your mom or something. That guy had issues...) Anyway, the best thing you can do in that situation is try and take control of the dream. Walk right out there on the field with your luggage in the wind. And do it proudly. It's your dream, your mind.

Just recently I had a similar dream. I was walking through the mall with a friend and I realized that I was bare-assed naked and everyone was staring at me. I was very embarassed but despite the fact that I was blushing like crazy, I ignored them and kept on walking like nothing was out of the ordinary. In fact, I played a few arcade games and got an ice cream. By that time, I was calm and being naked wasn't so stressful anymore. When I finished my ice cream, I looked around at everyone, shrugged, and said, "Well, I suppose I should go put some clothes on now."

Also, sometimes you dream so vividly that you believe you're still in this reality. Or, you dream when you're in that state halfway between sleep and waking. It's hard to explain, but you can dream when you're not fully asleep yet. It's a sort of astral projection, only not really. Those kinds of dreams can be pretty disorienting and distressing because your body and your mind aren't quite in agreement as to what's going on yet.

I'm not sure if that helped at all, but at least you know you're not alone. I think just about everyone has had a naked dream at least once in their lives.