It was by chance that we ran across Manassas National Battlefield Park. It wasn't on our to do list, but after the visit it really should have been.
The rangers are very sweet and knowledgeable. The visitor center has an impressive display of artifacts and a retelling of the battle. Go through this portion of the visitor section before heading outside, it'll make a difference in seeing the battle during the walking tour.
At our visit the weather was perfect! Once we stepped outside we started the walking tour around the battlefield. The area has been kept the same landscape as it was during the battle. There are makers around with information of the wounded and deceased soldiers and the cannons are in the very positions they were during the fighting. I seriously felt the intense fear of battle just imagining the confederates coming out of the trees to attack. It was a learning experience for everyone!
There isn't a fee for the park itself but, there is a small fee to go through the 'house tour and movie'.
WEAR COMFY SHOES
have a camera
have some water with you.
we went in early April so the whether was just turning warm