Dunno about away, but each club's highest non-finals HOME crowds are below (based on current home ground, double headers not included):
BRI 50,859 v Manly, 2011 R26 (Lockyer's last home game)
CAN 25,253 v Magpies, 1994 R21 (Meninga's last home game)
CBY 41,835 v Warriors, 2009 R25 (Hazem's last home game)
CRO 22,302 v Dragons, 2004 R8
GLD 27,176 v Broncos, 2008 R6
MAN 25,876 v Balmain, 1976 R11
MEL 24,081 v Dragons, 2011 R24
NEW 32,642 v Manly, 1995 R17
NQL 30,302 v Broncos, 1999 R8
PAR 27,243 v Souths, 1986 R24 (Ray Price's last home game)
PEN 22,582 v Eels, 2010 R19
STI 20,047 v Sharks, 2009 R3 (Kog)
SOU 34,315 v Bulldogs, 2007 R4
SYD 37,981 v Manly, 1996 R16
WAR 32,174 v Illawarra, 1995 R6
WST 34,272 v Eels, 2009 R24 (SFS) \ 22,877 v Souths, 2005 R20 (LCH) \ 20,527 v Cowboys, 2005 R23 (CS)
I've probably got one or two wrong - and before WT or STGI fans say anything - I'm using current clubs, not the previous incarnations of clubs.
Figures gleamed from the amazing
www.rugbyleagueproject.org