Military Housing: CAMP PENDLETON -- Christine Campbell stood in front of her family's faded yellow home at Camp Pendleton. Around this neighborhood of 1950s-era duplexes, the paint is peeling off the trim and, inside, wooden doors show the pockmarks and scars of decades of use. "Do you enjoy it?" asked H.T. Johnson, the Navy's assistant secretary for installations and the environment. Johnson, who took his post in August, toured the base yesterday to see housing that base officials have been fighting to upgrade for years. "Mmmmmm," Campbell answered. Then she blurted out, "It's not the best housing." After Johnson had left, Campbell detailed the woes of the base's older housing units: mold, bubbling paint. "My husband has been in 10 years, and this is it," she said. "I wish they would knock 'em down and start over."