You need at least two people who already know how to play the game.
Play begins by one person saying "I'M GOING ON A CAMPING TRIP AND I'M GOING TO BRING...(at this point the person talking picks anything s/he would like to bring on the trip.
Let's use a sleeping bag as an example) A SLEEPING BAG".
The next person says "I'M GOING ON A CAMPING TRIP AND I'M GOING TO BRING...(at this point the person talking picks anything s/he would like to bring on the trip, but it must begin with the letter "G", since the last letter of the first person 'camping accessory' was a "G".
For example let's say the second person wanted to bring a "GUARDIAN"  they can bring that so everyone says "OKAY YOU CAN BRING THAT ON OUR CAMPING TRIP". 
Say the third person hasn't caught on to the game yet and says, "I'M GOING ON A CAMPING TRIP AND I'M GOING TO BRING HOT DOGS".  Everyone should say, "NO, YOU CAN'T BRING HOT DOGS" and play continues to the next player until everyone has
caught onto the game.