1 -- Be sure to be lined up straight with wagon and tractor.

2 -. You need something to hold the first load up and some form of poles or building will do or hand stack some bales behind the first load.

3 --Brace up the load after unloaded and before pushing off .(see "A" red pole or pipe), after it has been set down move poles before  pushing off.

4. - Must have over head room for unloading, check the spec page for height needed for each wagon.

This can be a one man operation with this help. I have seen 1200 to 1500 bales stacked in one day with out too much trouble. If the unloading area ground  has a slight slope to the back it will help however this is not always possible.