Dave, I have been pretty lucky. The area the snappers are in most of the time is approx. 100 ft wide and 50 across and adjacent to the pond. The entire area ranges from 2 to 3 feet deep. When I am cutting the lawn I will see them on the surface and then they will also see me. They have all dived to the bottom and then tried to get back to the main pond by crawling along the bottom. well a good pair of polorized sun glasses and a rubber walleye net are all I have needed so far. As they crawl along the bottom if I cant see them they leave a trail of bubbles. I follow the bubbles until they come to my bridge and then the net goes in and the turtle comes out. Need to be a little patient as this can take 30 minutes some times but usually works. Then I have a 1/2 of a plastic 55 gallon drum that I place them in, put it in the back of the truck and away we go.

Its not how well you do something,
Its how well you look doing it!