@CrealCritter ... Just a suggestion... putting the hay flat to flat is great...tight against each.... protects the hay from more "aging" ... BUT don't let the rounded parts touch ...keep at least 6 inches or so apart... so the water does not run down against each bale... it will cause it to soak in more, rather than run all the way down the rounded part to the ground. The net wrap does more to protect from weathering than just strings(which we mostly use) so that is good for you.... I would keep the little bale out and put the same sized ones tight against each other for more protection from weathering...
We put ours in long rows along field edges/woods... but leave at least 1-2 ft between the rows so they can shed all rain directly to the ground off the rounded sides... and we can get inbetween them if we need to for any reason. The only time the rounded parts touch is if we are stacking to cover with a tarp... 3-2-1 to form a triangle- shape...
So nice to have the hay as an insurance against bad weather/drought/any other need. And anything that gets "crummy" is great mulch, as you well know and use yours. Glad you have that...