I use two 8' landscape timbers cut in half, leaving four, 4' mini-logs.
Screw the ends together using deck screws to make a 4' square frame.
On the bottom edge of the frame drive in spikes at an angle every three inches apart. this keeps the turtle from climbing back out of the frame.
Using chicken wire, (and old coat hanger pieces for rings) make a square basket and hook to the underside of this frame using fencepost staples.
Set this whole contraption in the water at the edge of the bank so the turtles can climb in.
(Place a 1"X8" plank to the edge and screw fast if needed!)
Bait with some chunks of small panfish, or dead minnows and check it the next day.
You can get a lot of turtles this way!
I have used the old hoop style traps but here in Indiana you have to have an opening above the water, so I came up with this.
While fishing if you see a large turtle head coming up, cut a small bluegill in half and place on a #1 hook or bigger on a leader with at least 20lb. test line and toss it where the head went under, and wait.
When it swims away set the hook HARD!
Have a good gunnysack to put the turtle in, and tie the bag closed. But watch out as they WILL snap at anything that touches the bag close to thier head!
Or take your knife and cut a hole thru the tail at the base of his shell, run the end of your anchor rope thru, tie a knot at the very end, and let him swim around while you finish your day fishing.
DO NOT sling this bagged turtle over your sholder to carry back to the truck!!
My grandad lost a 4" chunk of meat out of his sholder doing this...ran around like he was on fire with a backpack flopping around, till dad and I caught him and pried the turtle's jaws open!