I wouldnt slowplay but it is because i already expect to be paid and want to start building a pot, not because i am scared of being caught.
QQ calls you for a reasonable amount but probably doesnt reraise you here.

I dont think slowplaying here is terrible but against a preflop raise you could be facing a high pocket pair or a King against alot of players and i think at this level you can play for stacks on the flop against alot of players.

If he has AQ, AJ then you got unlucky and he folds to the raise.
If he has AA, QQ, JJ, AK, KQ, (others) then he probably isnt laying this down for alot of chips.
If you think they both have something they will pay you for, (if it catches up e.g. AJ) then i think slowplaying is fine.
At worst you have someone drawing to 2 outs but i still bet a reasonable amount on the flop here because i want high preflop raising hands to pay me off.
It is ok to slowplay but if an A comes you should try and get it all in then (subtly) as there are so many hands that pay you off and you want to start building a pot.


Disclaimer : i play 5NL so i dont know shit =)