According to the pilot, he circled and surveyed the private grass strip three times prior to his approach. He approached the airstrip at 67 knots with full flaps deployed. The airplane touched down approximately midfield of the 1,700 foot-long strip, bounced, and then landed two-thirds of the way down. Full braking was applied, but was ineffective due to the wet grass landing surface. The airplane continued off the departure end, through a wooden fence, and came to rest 25 feet beyond the fence. The pilot reported that there were no mechanical anomalies with the airplane, and that he chose not to abort the landing due to rising terrain at the departure end of the landing strip.