[Harv72b]

Check/raising to "trap the field for an extra bet" only works when UTG continuation bets (not always), one or more players call (not raise) that bet (not always), and UTG is then nice enough not to 3bet our check/raise (also not always). While going for the flop c/r is probably the best play here, betting out is not terrible either--especially if we get the chance to 3bet, and even more especially if UTG raises, one or both players call 2, and then we get to 3bet. If nothing else, you should be varying your play from time to time to avoid predictability (not that a lot of your opponents are paying that much attention in these games).

At higher stakes I could see value checking the river to induce a bluff out of a 7 or a lower busted flush draw, but at .10/.20 I think you gain much more value by betting & getting calls from worse hands.