If you need another reason to reconsider shelters, it will only be a matter of time before bedbugs become a stable in shelters, with harborage provided from all the cracks and crevices.
With a daily transient hiking population and hikers visiting from different countries, especially spending a night or two in the various cheaper motels that are cropping up in www.bedbugregistry.com, these sturdy little creatures will soon be hitching rides in clothing, backpacks and sleeping bags, only to be deposited at shelters.
An example, Atlanta, Philadelphia and Washington have a slew of hotels that have infestations, as do many hotels in all major cities.
Growing up in a pest control, business, we saw a few of these problems in the 60's and early 70's, but given the insecticides of the day, they were easily controlled.
If this trend of re-infestations doesn't reverse course soon, it might be a good idea to use permethrin more liberally on your clothing, backpack and sleeping gear.
One idea is that if you are traveling to and from the trail and need to stay somewhere that has been identified on the registry above, or you are not sure, you can wrap double-sided tape around the bed legs and bedframe/headboard to trap the bloodsuckers. Also remove the bedding and check the creases of the mattress cords and under the buttons, as well as between the mattress and boxspring. If you find anything demand to be moved to a new room.
http://www.bugclinic.com/bedbug.htm
Toolshed