Nice Hand...How Should I Extract More Money?

I got this today. Very welcome, but I'm no good at extracting money off of a scary board when I have the nuts.

Q8 suited, one off the button. A few limpers so I limped. Flop comes:

Q K 8 (2 hearts on board, I have none)

I bet the pot after it was checked to me, one caller (button)

Turn is another Q, giving me FH. I bet half pot, trying to make it look as though I was scared of the Queens and his call earlier. He raised to the pot and I called.

River is the last Queen, quads. Given he raised my earlier weak bet, I put out another half pot bet. He folded. Any tips would be welcome. It was a 0.05/0.10 game.

I think you played it well. The only other way I think you could have gotten something more out of him (my guess is he was holding an ace and put you on K) is to make a small bet, say the size of your bet on the turn and hope he takes a stab at it. Although I still doubt he would, unless he was an idiot.

Than all bets are off.

Any time you bet on the street after someone raises, they know you have something. It doesn't matter how weak a bet it is, you are saying to them that their raise meant nothing to you because you know you have them covered. But anyways, he would have called the river bet with an 8 or K.

The only way you are getting more money from this exact situation is to reraise the turn while he still thinks he has a chance for his draw (he has no reason to suspect a boat). If you planned to bet out on the river, you might as well reraise the turn instead since he will call almost anything with 1 card to come. But it's tough to put him on a draw when he raises like that, so a turn reraise is pretty much hindsight.

I personally would have called the turn raise and checked the river. You must check here because any hand he would call with, he will bet with (K or 8 in his hand). He's not going to raise you twice. People rarely make that mistake. He may bluff at the pot with a missed draw, though, since you were repping the draw and he was repping the Queen. So my move is call turn and check river.