Outdoor Pest Control - woodpecker in Minnesota

Hello
We moved into this house in Lake Elmo Minnesota a little over a year ago. We live next to a wooded park trail, and there is an abundance of wildlife that we appreciate. And then there are the woodpeckers... We don't mind hearing them in the woods, but our cedar siding doesn't stand up to the pecking so well. I've read that they may be searching for food (insects), if that's the case, how do I find and eliminate the food source. Any suggestions/ advice would be appreciated.
Brian in Lake Elmo

Inspect siding for insect damage. Woodpeckers will peck into siding in search of insect and larvae and damage siding. Carpenter bee larvae are very tasty. If you find insect holes and entryways, puff powdered insecticide dust into holes and wait two or three days before filling holes. Adults will exit and reenter, delivering poison to the larvae. They will die before they emerge. Inspection of siding, puffing insecticide, and making repairs should be done about dusk when bees have returned to nests. Carry insecticide spray with you just in case and wear long sleeves and pants.

Keep in mind, too, that woodpeckers drum to identify territory. The drumming is a warning to other male woodpeckers to keep out of this territory. Drumming also attracts females during mating season.

Brian, page 4 here offers some solutions for exclusion and avoidance.
http://www.ces.ncsu.edu/nreos/wild/pdf/wildlife/WOODPECKERS.PDF

Newt