The main build advice for any character in this AP is to have skills like swim, climb, profession (Sailor), etc. As for actual combat abilities, just make sure you can do something underwater and in cramped conditions and you're golden.
As for basic Monk building advice.. I can't really help ye there :(
This is a monk I built in HeroLab for a friend playing in our S&S game when we started last year. Since he's pretty low level, he's a pretty good base for a monk in this campaign. His background is a little different, but it should be easy to include a Drunken Master Element to it. (In this player's case, he was basically Shepard Book from FireFly.)
This is a 20 pt build. [-edit]
...Heh, this is actually one of my favorite characters I've built for friends and kept for myself to use later.
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Xian Whu
Male Human (Tian-Shu) Monk 1
LN Medium Humanoid (human)
Init +3; Senses Perception +6
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Defense
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AC 16, touch 16, flat-footed 12 (+3 Dex, +1 dodge)
hp 11 (1d8+3)
Fort +2, Ref +5, Will +4
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Offense
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Speed 30 ft.
Melee Unarmed strike +2 (1d6+2/x2)
Ranged Shuriken +3 (1d2+2/x2)
Special Attacks flurry of blows -1/-1
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Str 14, Dex 16, Con 10, Int 12, Wis 14, Cha 11
Base Atk +0; CMB +2; CMD 18
Feats: Desperate Battler, Dodge, Improved Unarmed Strike, Stunning Fist (1/day) (DC 12), Toughness +3
Traits: Ease of Faith, Ship's Surgeon
Skills: Acrobatics +7, Craft (carpentry) +6, Diplomacy +5, Heal +9, Perception +6, Stealth +7, Swim +6
Languages Common, Tien, Varisian
SQ ac bonus +2, stunning fist (stun), unarmed strike (1d6)
Combat Gear Healer's kit; Other Gear Shuriken (15), 149 GP
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Special Abilities
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AC Bonus +2 The Monk adds his Wisdom bonus to AC and CMD, more at higher levels.
Desperate Battler Gain +1 morale bonus on melee attack and damage when alone
Flurry of Blows -1/-1 (Ex) Make Flurry of Blows attack as a full rd action.
Improved Unarmed Strike: Unarmed strikes don't cause attacks of opportunity, and can be lethal.
Stunning Fist (1/day) (DC 12) You can stun an opponent with an unarmed attack.
Stunning Fist (Stun) (Ex) At 1st level, the monk gains Stunning Fist as a bonus feat, even if he does not meet the prerequisites. At 4th level, and every 4 levels thereafter, the monk gains the ability to apply a new condition to the target of his Stunning Fist.
Unarmed Strike (1d6) The Monk does lethal damage with his unarmed strikes.
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This stoic and thoughtful ship's carpenter is really a wandering monk, seeking enlightenment.
Several years ago, while a passenger aboard a pirate captured vessel, Xian (pronounced like John) saw a chance to learn more of the world while healing those he could with his skills.
The fact that he could swing a hammer as well as provide basic healing endeared him to the pirates, and his martial talents earned him the nickname "Fisticuffs Jon."
Since then Xian has been further than he thought he ever would and learned he has much further to go.
im curently running a martial artist and hes been getting along pretty well. i gave him skill focus sense motive and went snake style. it makes him near impossible to hit and the ability to do pierceing damage underwater saved his butt many a time