In general the south side is a little tougher to fish than the North Side,but both sides have their days and nights of hard core surf fishing. Its about wind, tide, time of year,and avaiable bait to name a few factors. As for action you may get lucky in the fall and walk into blitzes that may last an entire tide. In the spring and summer it may take a little more effort to learn the winds and tides-but the effort is worth it. Thats not to say the winds and tide are not important in the fall-they are in my book, the 2 most important conditions. The thing about Montauk is that an area may produce on low ebb with NW winds,and another area that is no more than 100yds away maybe low flood with NE winds--just for example.So yes the action can be excellent but you will have to put in the time to learn it.---good luck