Obvious flush draw, paired board and I catch my boat on the turn, but both opponents seem to like their hands. Comments on turn play, river?

Party Poker No-Limit Hold'em, $ BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

Hero ($99)
MP2 ($218.37)
MP3 ($88.50)
CO ($76.30)
Button ($17.50)
SB ($94.05)
BB ($62.96)
UTG ($86.35)
UTG+1 ($179.28)

Preflop: Hero is MP1 with 8, 8. SB posts a blind of $0.50.
1 fold, UTG+1 calls $1, Hero calls $1, 4 folds, SB (poster) completes, BB checks.

Flop: ($4) 6, 4, 4 (4 players)
SB checks, BB checks, UTG+1 checks, Hero bets $3, SB calls $3, BB folds, UTG+1 calls $3.

Turn: ($13) 8 (3 players)
SB checks, UTG+1 bets $10, Hero calls $10, SB calls $10.

River: ($43) A (3 players)
SB checks, UTG+1 bets $20, Hero raises to $60, SB calls $60, UTG+1 calls $40.

Final Pot: $223

Results in white below:
SB has Js Ks (flush, king high).
UTG+1 has 2s Qs (flush, queen high).
Hero has 8d 8c (full house, eights full of fours).
Outcome: Hero wins $223.