If we bought season passes in Aug.of 2020 and it say its a 2020-21 gold pass is it valid through this year?

Yes

Yes you have to purchase new ones. They had to be purchased before April 2020.

You still have to renew it after the end of August.but you should be good. I'd call and check though I know when I bought my season passes this year that it asked if I wanted to renew. Still cheaper than buying tickets everytime tho.

Now thats a wierd case usually no but with covid last year it might u would honestly have to speak with guest relations to be sure