I know the feeling. I work in Philadelphia and most cannot understand why I would want to go where there is no sidewalks. You dont even want to talk about hunting with them. They dont get why I would sit for hours at a time in one spot and not see a thing all day besides trees. I just tell them the trees and a better view than the one from my window in my office.

All to often must i have to explain, i jus tell them that its something u jus have to try to understand.

Jeep and Harley have sayings...
"It's a Jeep thing"
"If you rode one, You'd understand"

What would the equivalent be for campers?...
"It's a Back to Nature thing"
"It's about unplugging from the world"
"It's how I keep my mancard current" (no offense to the female campers)

You can't hold the Harley saying against me.....I don't ride one  :hardhat: 

It's really the same with any hobby or pastime. You do it because you enjoy it. I'm sure that person that's giving you the odd look when you tell them about your weekend has something they do that you'd give them odd looks for.