I hope to see them in a couple weeks.
I saw them last year and they were amazing.
I too was a little disappointed at the lack of crowd response.
Unfortunately, unlike bands like RUSH, DEEP PURPLE, etc, most of the younger generation of hard rock and metal fans have not yet discovered the Heep!
I am 36 and was EASILY the youngest person in the crowd when I saw them last year.
2/18: Ghost In The Ruins / Maiden Chicago / The Mob Rules
3/17: Iced Earth / Warbringer / Ghost In The Ruins / Depremacy