If opening for 30 at a 4/4 200 max table is going to routinely get 5 callers - and by your lead in "pretty loose preflop" I'd wager this is so, I see no reason not to open up for more pre and keep the pot 3 way instead of 6 way . . .
I absolutely hate the move, but if I'm at a game this loose where it's either raise a reasonable amount and get the entire table calling, or raise way to much and win the blinds, I'll usually just limp early and hope I can reraise preflop.