I used to nail, then wire, a christmas tree to each corner of a 44" x 46" pallet. Then I would put weight in the middle of the pallet, usually block - but I came into a collection of old cut up railroad rail once.
Then I'd sink those pallets on underwater points starting on the deep side toward the creek channel and move up into shallower water with each pallet. This allowed me to move up and down the point from deep to shallow depending upon where the fish were.
I'd put them out in March or April in the middle of the night. People with depthfiders found a few, but if they didn't know how I'd configured them they couldn't really fish it right.
PVC pipe in a spider form in a small bucket (I used old tree buckets) of concrete works good...most depthfiders didn't pick up the pvc pipe, only the concrete.