Roughing it isn't as rough when you bring along a basket filled with s'mores ingredients. 

Cut lunch bags in half, and fold down the tops to hold graham crackers and marshmallows -- and don't forget the chocolate bars. 

Also include these campfire-building instructions, courtesy of the Girl Scouts of the USA.

Tools and Materials
Tinder: pine needles, bark, and matchstick-width sticks. 
Kindling: twigs, about as wide as your thumb. 
Fuel: sticks larger than the width of your thumb and small logs.

Campfire How-To
1. Arrange 3 pieces of kindling in an A shape in a cleared area. Set a handful of tinder near the A's crossbar. Light tinder from underneath; let burn until you have a healthy flame.

2. Add kindling, tepee-style, over tinder, waiting for each piece to catch before adding a new one. As the fire grows stronger, add fuel, 1 piece at a time, as above.