If we are on a trip we are sight-seeing, or if just stopping for the night chilling out, either inside or out depending on the weather.
If we are just camping at our local park I'll have to say that I'm one of those campers you might not see a lot of, if the weather is bad. Then it is just a long walk with the dogs a few times during the day. The rest of the time I'm probably inside reading, internet surfing, watching a movie - the day seems to go quickly. I enjoy relaxing inside - it is a break from all the stuff at home. The camper has huge windows, so I can enjoy the view without getting rained on, or having the wind blow me away. I have a hobby farm so it isn't like I'm desperate for outside.
When the weather is good I like to meet the neighbors, walk some more, and read outside, or even just enjoy the sounds of the park.