NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO! DON'T PUT ANYTHING ELSE IN THE HOLE!

Backfill in the whole with the original soil. Nothing else. period.

Plant a couple inches above ground level. it will eventually sink a bit anyway. Make sure you see root flares, scrape some off if needed to expose root flares first before planting it.

Make sure you dig up a square hole about 5 feet across to break up compaction so that the roots will spread out quickly. The larger, the better. Make sure the side are rough, not smooth. Don't dig too deep though but it's tricky to get it exactly. If dug too deep, back fill some and water them down good.

Put the tree in the middle and back fill about 1/3 and water them in to get rid of air pockets. Repeat till you have filled in.

Put down one inch layer of compost around the tree perferably 5 feet across and hardwood mulch that should look like a donut, nothing in the hole meaning nothing touches the trunk with 3-4 inches deep in the outer part.

Stake them if NEEDED. If needed, make sure to give them a few inches to sway so they can get stronger. Take stakes out after they have lost their leaves in the fall. Winds don't seem to affect them very much during the fall/winter.

Make sure to water them deeply. If you water your lawn deeply once a week during the summer when you don't get much rain, that should be enough. Otherwise get a soaker hose.

If you can, get seaweed liquid and soak the roots throughly before planting. They seem to help alot.