Now that the CDC has confirmed high (toxic) levels of formaldehyde in
the travel trailers FEMA supplied to Katrina victims, especially in warm
weather, I did a google search on Formaldehyde in campers.  It turns out
that:

1.  There are no regulations about or standards for levels of
formaldehyde for RV trailers/campers.  This will probably change soon.

2.  Probably all RV trailer/camper manufacturers in the past have used
products (such as in floors) which can give off a lot of formaldehyde.

3.  The RV Industry association set standards only recently for
formaldehyde in RV's that parallel those standards used in 'manufactured
housing'.  This is not law or regulation, and no notice is required to
buyers (it IS required for manufactured housing).

I have even seen one web site where a person had a log of his complaints
about his TT and formaldehyde smell, and the responses from the dealer
and the manufacturer (Jayco) first acknowledging a problem and giving
advice about how to get rid of the fumes, then denying that there ever
was a problem.

I have heard of some camper manufacturers that had already switched to
formaldehyde-free construction products before the recent flap.

I suppose that pop-up campers are so non-air tight that a toxic buildup
of formaldehyde is unlikely after it is opened up for a few minutes.
Even so, I would recommend a *thorough* airing of the camper especially
in the Spring with the first opening, and then also every time you open
the camper up, *before* closing all windows and doors for air
conditioning or heating.  The higher the temperature the more
formaldehyde is released.

Test kits for formaldehyde levels in the air do exits, if you are
interested.

At any rate, if you or someone you know is going to purchase a new
pop-up camper, I would suggest doing your homework about the use of
formaldehyde containing products in the manufacture (and knowing the
answer, if possible, before asking the dealer, so that if his answer is
wrong, you can run for the nearest exit).