They should think outside the square and send a crew to Hawaii, infiltrate ILWU Local 142 and other ILWU locals to control the ports in Hawaii. There is also the lucrative meth trade, meth fetches a higher price in Hawaii than anywhere else in the world. Just make a deal with the Mexicans for their super meth. There are other money making ventures to be had in Hawaii as well.
I don't think there's a lot of Mob guys in Hawaii, unless they're on vacation or in witness protection. I don't think there ever were Italian neighborhoods there either. How are they going to move in to a place thousands of miles from their traditional area, and just take over the ports? Especially now when anyone working in a port facility has to undergo a background check.