Hi Matt
I like Monza, Spa and Canada but for atmosphere you can’t beat Silverstone. The circuit usually shuts down by approx half 8 in the evening but if you are camping the party goes on at both Woodlands and Hamilton Fields which I highly recommend. The Snoozebox experience has been recommended to me although it is expensive. For your 1st Grand Prix you really should try either Silverstone or Monza. Hope this helps.