Ate tents, folding chairs, coolets, and wagons allowed at the games?

The answer is yes. Unique facility though. Plenty of seating, good part of it protected from rain, and most of it concrete paved around home plates.

Don't need them. Has stadium sitting

Don't need folding chairs, there is tons of seating in the stands, nor are tents needed. Not sure about coolers or wagons. Have fun!