Last year the rain was biblical the night before the race, way wetter than the forecast this year. The course was fine, I’d recommend tyres in the racing ralph category. The roots will be wet which no tyre will help with and the top layer a bit sticky, you want open tread and it will clear fine.
I did see a few people WAY out of their depth because of the wet roots (including one lass in floods of tears 😔) but it’s a great course, plenty fast and fun. It’s an MTB race, stay off the brakes, take the highest line you can and eat cake. You’ll be fine. 👍🏻😎