Shambala wrote:I'm meeting some friends to go camping!

And the agent says "What's their names and addresses, where are they from and how do you know them? How about you write all that down and then we'll discuss it."Don't open doors you don't have to. You can explain it, but they're working to protect their country, so don't waste their time making them think they have to take you into a room and interrogate you to verify your intentions. It also wastes your time, you may miss your flight, or they may feel uncomfortable enough that you're denied entry.
Flying in, and entry by other means, you are required to provide the duration of your stay and the address you'll be staying at.
645 Journey Street
Black Rock City, Nevada.
(mix the street address up a bit, we don't want their computer showing 20,000 people planning on staying at the same address)
Don't volunteer (don't waste their time or risk confusing them unnecessarily), but if they ask for more detail: "
attending the week long Burning Man Art Festival at Black Rock City, Nevada. It's North of Reno, near Gerlach, Nevada."
Adding any additional time you'll spend in the country, like seeing Las Vegas, the Grand Canyon, etc.. You're another boring tourist bringing useless stuff you'll never need.
Burning Man Art Festival
645 Journey Street
Black Rock City, Nevada.