Is flop a call (and a semibluff raise HU) with our gutshot and back door combo draw equity? Villains are both positionally unaware 20/11's, neither of which is a particularly good player.

PokerStars - $0.10 NL - Holdem - 8 players
Hand converted by PokerTracker 4

SB: 112.7 BB (VPIP: 29.44, PFR: 22.08, 3Bet Preflop: 2.56, Hands: 237)
BB: 100 BB (VPIP: 11.07, PFR: 8.08, 3Bet Preflop: 6.80, Hands: 813)
UTG: 40 BB (VPIP: 12.86, PFR: 11.43, 3Bet Preflop: 0.00, Hands: 73)
UTG+1: 105.5 BB (VPIP: 15.38, PFR: 13.46, 3Bet Preflop: 4.55, Hands: 52)
MP: 143.4 BB (VPIP: 17.33, PFR: 16.00, 3Bet Preflop: 6.67, Hands: 152)
MP+1: 143.2 BB (VPIP: 19.51, PFR: 10.98, 3Bet Preflop: 3.03, Hands: 83)
Hero (CO): 118.3 BB
BTN: 154.2 BB (VPIP: 19.82, PFR: 10.93, 3Bet Preflop: 1.04, Hands: 1,005)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has 8 9

fold, fold, fold, MP+1 raises to 2.5 BB, Hero calls 2.5 BB, BTN calls 2.5 BB, fold, fold

Flop: (9 BB, 3 players) J 5 6
MP+1 bets 4.3 BB, Hero?

It's a bit meh with BTN left to act behind but, imo, it's not a completely terrible spot to float. I do like a raise if it's HU and we're IP tho. Lots of Turns give us extra equity and there are lots of others we can barrel.