We're seniors&sit on the berm. Are ground cushions permitted?

Yes

I'm sure

if you feel the need to get up and walk around you can watch the game from more than half the stadium. you can also stand right above the pitchers ball pin and watch them warm up....literary right above them. they made it a awesome place to watch baseball.

Yes and bring a hat sunglasses and lotion. U face full into the sun

Yup

You can use cushions.