I use a 6', round post behind my disk while disking and covering. This is the forth year I've been using this set up. It takes longer but it does a good job. I disk and cover so the pole doesn't bounce and is in constant contact with the ground.

We used to use a chain link gate behind an ATV. In our case, the gate looked like it did a good job because all of the seed was dusted when finished. After the rain washed the dust off it was alarming how much seed wasn't covered. Maybe some weight would have helped. The crows and turkeys appreciated it though.