I had a really crappy year on the night bite last year regarding yellowfin(about 3 fish per night), but we did the same exact thing we always do - set up in the warm side around 100 fathoms, or on top of bait, where we are marking tuna. Sometimes I think the key is setting up in a spot where the bite was hot the night before. I suspect that's how Canyon Runner gets their night bite going over and over again. We exerimented with moving more, and fishing the cold side, and also deeper water where we sometimes got a few fish & definitely swordfish. Other years we have had great nights too, when the water was cold, or warm but after last year I'm just shrugging my shoulders because I don't think we did anything really wrong. One thing I definitely noticed is that when the tide went slack, we caught fish, don't ask me why.