Spa or Imola?

I was planning on going to Le Mans again this year but seeing that it sold out in stupid time that's not going to happen. As a fall back I'm looking at Spa or Imola to get me some Valkyrie fix. I know a bit about Spa but very little about Imola with regarding to circuit access, camping, spectating, pit access, support races, etc so that why I'm looking for some advice from you good people.

If you were to attend one of these races which one would you do? I'll be driving down in an MX5 and not adverse to going the pretty way.

Edit: or would you just do the Spa24 or N24 instead?