No reads. How do you play this against an unknown?

***** Hand History for Game 4466059222 *****
$200 NL Texas Hold'em - Wednesday, June 07, 23:55:29 ET 2006
Table Glenferrie (Real Money)
Seat 8 is the button
Total number of players : 10
Seat 1: toledo123 ( $266.20 )
Seat 3: azriverdoc ( $232.65 )
Seat 8: bighapapapa ( $585.52 )
Seat 10: RockElder ( $239.52 )
Seat 7: dadonkstar ( $233.75 )
Seat 4: frenchy33 ( $196.65 )
Seat 6: rob123b ( $200 )
Seat 2: stew1866 ( $53 )
Seat 9: STLs_FINEST ( $198 )
Seat 5: JPDBO23 ( $101 )
STLs_FINEST posts small blind [$1].
RockElder posts big blind [$2].
** Dealing down cards **
Dealt to dadonkstar [ Kh Ad ]
toledo123 calls [$2].
stew1866 calls [$2].
azriverdoc folds.
frenchy33 folds.
JPDBO23 folds.
rob123b folds.
dadonkstar raises [$12].
bighapapapa folds.
STLs_FINEST folds.
RockElder folds.
toledo123 raises [$30].
stew1866 folds.
dadonkstar calls [$20].
** Dealing Flop ** [ Qs, Qh, Qc ]
toledo123 checks.
dadonkstar...?