For me the biggest favourite is Tlustak, especially with that car. Tomaštík can be also very fast here, this is home event for him. Sýkora will fight with Odložilík for second place in championship. But of course I would cheer the most for Jakeš :)
But again, I noticed lot of restricted areas, very difficult for spectators to find some great spot for watching :(
I expect nice weather, sky seems to be clear right now. My guess is sunny, warm day like it was today.