For the smaller traps I have used a soup can lid with the edges curled down and then bent into shape with two pieces folded up to hold the trap and the center to nail or screw the lid down. Works fine for board or tree sets. There is also ones that you can buy from a trapping supply store. The 330's I only have used sticks in the mud or dirt or wire them to trees.
A quick support I use for 330's is a small chunk of plywood with 3 or 4 nails hammered in for the jaws to pinch onto. 12 inch piece is good to avoid the trap rocking when they step on the plywood. I typically set culverts with this setup for otter.
connibear support holder
Linear Mode
