Do I use dirt or gravel to fill around a cement form for a fence post?
I ended up just putting the dirt back and tamping it down really hard with some random tools b/c I don't have a tamper. First I used the curved end of a large crowbar. Then I used a sledge hammer. I just filled in w/ dirt about 6 inches and then pounded all around for about 3 minutes. Then filled w/ dirt again. Not sure if this was "the" right way, but seems to be working really well. Very little wiggle room between the form and the ground.