I would suggest you contact one of the district supervisors on the District
that your son works for. They should readily know your son by name and
should be able and willing (if they dont already know) to contact the
dispatch office and find out the current location and status of the crew
your son is on. Typically (at least our organization) does not give out this
type of information with the exception of family (parents/spouse).
At times I have seen on the GACC (geographic area coordination sites)
sites (www.nifc.gov/fireinfo/geomap.html) lists of crews that are assigned
to their area but this has been a hit and miss thing, lately I havent been
able to find this kind of list.
With the proliferation of the web it is much easier for family and friends
to at least keep track of the fire that they are on or at least the fire
activity in that area. Quite often is it very difficult if not impossible to
call home on a routine basis when they are off on a fire. I would suggest
next time your son is home, buy him one of those phone cards that he can use
anywhere to make a quick check-in call home when he gets a chance.