What To Look For
When selecting a camping air mattress you likely will want a closed-cell mattress. Rather than being filled with air, a closed-cell mattress has foam compartments that soak up air, inflating evenly. Closed-cell mattresses are more durable and can self-inflate. Self-inflating models, such as the Eureka AirRest, make camp setup easier. However, if you are looking for a little extra comfort, something with multiple air chambers--like the foot-pump inflatable Exped AirMat--may suit your needs.
Common Pitfalls
One of the most common mistakes people make is to pick an air mattress not suited to their needs. Backpackers often can live with a 3/4-length mattress, designed to support their backs only. On the other hand, car campers can purchase a thicker, full-length mattress. While all camping air mattresses are light, people often don't take into account pumps that may be required for mattresses that don't self-inflate. Carrying a pump can quickly negate the advantages of a lightweight air mattress.
Where To Buy
Outdoor outfitters are the best place to shop for air mattresses. Bring along a sleeping bag and try out the full arrangement. Lie down on the mattress and really get a sense for how well it keeps you off the ground.
Cost
A Therm-A-Rest, often considered the standard for self-inflating air mattresses, typically costs between $80 and $120. The most expensive model, the Toughskin, which was selling for $120 in 2009, costs extra because of its puncture-resistant surface designed to hold up to sharp rocks. Other, often less durable, air mattresses can be found for around $50. The previously mentioned Exped AirMat costs $66.
Comparison Shopping
If your camping trips are primarily within range of a car, a larger air mattress from a big-box store might suffice. Air mattresses also can be found online, but make sure you know what lying on it is like before buying. Look for online shops that offer free shipping, as this can drastically reduce what you pay for a mattress.
Accessories
There are two accessories every owner of an air mattress should carry. The first is a stuff-sack. Most air mattresses can be rolled tightly enough to fit in a relatively condensed space. Try to buy a stuff sack at the same time as your mattress to ensure a proper fit. The second accessory worth having is a patch kit, just in case you spring a leak.
