The Gettysburg rules were set by the winners.
Regimental monuments were only allowed where a unit spent the night, therefore all the union regimental monuments are on the high ground and all the confederate regimental monuments are at the bottom of hills. There is 1 Maryland confederate marker up by spangler's spring because they held it overnight and were driven back in the AM.
In addition in the 50 years after the battle, when most of the monuments were done, the local teams had both more money to pay for the work and more people who could make the trip to see it. Pennsylvania has the largest monument, etc.
Yous guys do have a few nice monuments along Confederate Avenue, including the Alabama monument. It's so fiercesome it looks like you won.
Even with all these advantages for the home team, everybody I ever met there sides with the South, especially since the Scout Medal hike ends with Pickett's charge. The youth campsite that our Scout troop used is actually in the woods where Pickett's division spent the night before the charge.