COTA is pretty amazing. I did a Driving Event on it in one of our street cars once. I thought I loved Laguna Seca, but COTA stole my heart. My husband does amateur autoracing with SCCA. They just had a race there 2 weeks ago. He said the grip is great on the new sections, and they are not bumpy. However, they didn't resurface the entire track, so in the rain, the old sections are pretty slick now. He thought it was fun
There are usual 4-6 of us in a car, so we split the cost of parking and only need 1 spot. Some years have been more expensive than others, but a lot of times we can get a spot in someone's yard, usually arranged ahead of time, for about $50. It's usually not too far of a walk. Never park such that you have to pull onto 16th street. The traffic after the race is really bad. We usually try to take a back way out toward Allison or Mug n Bun to leave the track.
Cover would be great. I just wear a sunhat and sunscreen or a sunshirt. We are from Texas though, so we expect the sun. It can be really cold too. I think we have seen almost every weather, except snow, including a tornado warning that closed the track. My first year, the race was rained out until Tuesday
I do like our visibility where we are. There's always a lot of action near us.