Back reeling will work, and is the most simple, thats what I do. Like you said, 1 complete back real is between 1.5-2 ft, depending on the size of the reel. You need to add enough weight to keep the bait at that depth. This time of year I fish one line at 20 ft-(10 back reels), and one at 30 ft-(15 back reels). Once you catch a fish put both lines down that depth.
I use 2 large split shots about 18-24 inches above the hook and thats what works for me. The key is that you must keep the lines vertical. To do this you must move very slowly, remember this isn't trolling. If you see the lines starting to slant upwards your moving to fast. Very slowly paddle around. I use a strike guard, but a rubber band will work well to. Keep the bail open. When the line gets pulled off, wait 15 seconds or so, longer if it was a bigger sawbelly.If you have a fish finder paddle around and find a big ball of bait before you lower the lines down, the trout are never far from a school of sawbellies. Wind will play a huge role. If the wind is blowing you around and you cant maintain good boat control, this method doesn't work because the lines will not be vertical, and wont be in the strike zone. Windier days I will usually troll. As stated before, fishing in the middle of the day especially in the summer will greatly reduce your chances.
As for Croton Falls, the fishing has been good most days. I caught my biggest brown this year at Croton Falls at 7.2 lbs back in mid may. I wouldn't bother going through the troubles to move your boat however, there are plenty of trout in Titicus which is more heavily stocked with brown trout than both Cross River and Croton Falls despite the fact that it is smaller.
Good Luck