Maybe your brake discs/drums are getting a coat of rust overnight, and the
squeal happens as that rust is polished off by the pads?  Here in Michigan
brakes in all of my cars have been grabby and noisy for the first stop or
two in the morning, especially in the winter when I'm driving on salted
roads a lot.

             _ _
  __ _ _   _| | |  | David M. Brodbeck (N8SRE)              Ypsilanti, MI
 / _` | | | | | |  +-----------------------------------------------------
| (_| | |_| | | | @ cyberspace.org
 \__, |\__,_|_|_| "The VW camper is a brilliant invention -- it's like a
 |___/             Swiss army knife for the road... It's the stealth RV."
                                                        -- Wayne Curtis