Yeah, I stay in Reading area and take the hours drive in, much easier. Don't see any more than 30 mins of traffic in or out. It's very well organised.
My third time this weekend, went for two days. I think next time I'm gonna get basic Grandstand access however. It was much busier this time and it's only getting bigger. I did enjoy it and saw all I wanted to see, but this event no matter how long you go for leaves you with anxiety you didn't see it all. 3rd time there and still not made it to the rally stages.
It's structured really well though, mostly runs on time and barring any mechanical issues, all the cars run twice a day so you can plan what you see run vs exploring the plethora of other stuff going on.
Highlight was riding in an F-Type for a few skids, that was fun, great drivers and what a car. Even the V6, quality place to sit.
There's no event like it for getting up close and personal with running vehicles of all disciplines, seeing your hero cars and sometimes heroes driving them in all their glory. The access is just unparalleled. The crowds are an issue, but it's so so worth it. Plan the day right with the schedule and you'll come away happy.