His bogey-free round included eight birdies, and he shot a 31 on the back nine.
Eggeling shot 67 today in another bogey-free round on the 6,015-yard course.
It finished off a bogey-free round of 66.
He had five birdies in a bogey-free round in seeking the first prize of $216,000.
He had a bogey-free fourth round and finished at 19-under 269, matching a tournament best.
Singh's bogey-free round started with seven consecutive pars, but he knew that birdies were available.
Winning for the second time since November and completing a bogey-free round on a difficult course, Campbell finished at 270, 18 under par.
The bogey-free round matched the tournament record set last year by Graham Marsh.
Powell had eight birdies during a bogey-free round in the Senior Tour event that gave him a 36-hole score of 12-under 132.
"My game is starting to come around," said Daniel after her bogey-free round of 67.