Incredible $1-2 table last night with huge stacks and 4-5 really bad fish- a few are drunk and chips are just flying everywhere. I'm running like shit at the moment. Worked up to $400 stack then lost $200 with AK suited on back to back hands- 1st hand I have top two and lose to J6 off that limp called $15 preflop, next hand I flop NFD and two overs and have to fold after a tight player check raises flop and bombs turn. 3-4 hands later this hand occurs:

Hero open MP for $8 with AQdd with $240 stack

3 callers behind- 2 bad fish (one very drunk and reckless, one an ABC fish) plus another guy in the SB who is also a fish, but a bit more aggressive and capable of making moves then your standard fish in this game.

BB re-pops it to $18. This is the same guy who limp called $15 with J6 a few hands earlier. He was opening a lot of hands and 3 betting a lot and showing down crap. He'd made these small 3-bets a bunch and was just building pots pre flop recklessly. Playing very loose after flop as well. Stack is ~$500. I flat the $10 extra and the other 3 come along as well (standard for this table).

Five to the flop. Pot $90

Flop: 984dd

SB Checks
BB LAG checks
Hero checks
ABC Fish checks
Drunk Fish bets $50 and has about $300 behind

SB Calls the $50 with about $250 behind.
BB Folds.
Hero?

Advice on all decision points? Should I be 4-betting pre to ISO the LAG maniac? Should I bet out on this flop? I decided to check and try to realize some equity in this large pot as well as add deception should I bink the turn.

Sorry to be longwinded. Thats the nature of live poker hand histories I guess! Thanks guys.