I have been to both speedway meetings in Scunthorpe now Northumbiron where 600 spectators were allowed to attend and upto today I have not been notified of any cases of Covid.
As we have around that amount of season ticket holders I personally think the risk is minimal, we will be told to wear masks and stay in our seats as much as possible.
We should IMO Also be allowed to bring in our own food and drink As long as you take away your rubbish after the game, follow social distancing and generally try to keep apart as much as possible I believe we would be ok.
And If we are allowed back to games it is still a personal choice if you attend or do not attend games.