what is the best type of bed to bring camping?

The Camp Time Roll-A-Cot is a natural for camp and cabin, or as a spare bed at home.

• Tough 1000-denier polyester mesh provides breathable comfort for a good night's sleep
• Fabric tension is easily adjusted with a twist of the wing nut
• Strong tubular aluminum alloy frame has the strength of steel at 1/3 the weight
• Convenient carry bag attaches to cot frame to double as a night storage pouch

       http://www.rei.com

There are a couple of great beds to sleep on when you are camping.  There are air mattresses and actual folding beds and cots.  Here are just a couple of each you should take a look at.

The Pure Comfort Full Size Raised Airbed with Flocked Top is a very comfortable bed.  It has a coil-beam that cushions to your body.  It has an air pump to inflate your mattress in about 4 minutes.  It has a 2-in-1 valve for fast inflation and deflation.  It has the flocked top for extra comfort. 

The Steel Camping Bed Camping Cot is extra-wide for comfort.  It will support up to 300 pounds.  There is non-slip foot caps so your cot will not go anywhere.  It has heavy duty stitching so it won't tear.  It has a durable aluminum frame so it won't bend.  It is a strong comfortable bed.

The last one is the Camping Cabela's Folding Cot with Airbed and Pump.  This cot unfolds within seconds.  It holds upto 250 pounds.  It is made of solid construction so no bending, no tearing or no popping.  It is one of the best.

I hope this helps you in your search.  Thank you for your question.