I am able to back my trailer down next to the water's edge, so I tried putting the cat trax (w/o cradles) under the boat while it was in the water. Not very easy when done solo since the wheels are very buoyant. Sailcraft recommended putting the boat on the sand before trying to put the cat trax under the boat so you can sort of "anchor" one end of the boat in the sand. As you can see from the picture, I probably won't be using the cat trax at the Dunedin Causeway.
Since the beach is pretty flat, I was hoping to minimize dragging the boat much across the shoreline or shallow water since this "sand" is like coarse sandpaper.
The larger Cats that temporarily use anchors here usually have a front crossbar at the bow tips so they just hook their anchor line to the middle of this beam. They also have furling jibs which also helps since the H16 jib can get hung up on the mast and cause the boat to turn/sail when anchored.
With regards to using a "Y" bridle on the anchor line connected to the two bow tangs, I am not sure whether to make the two branches of the "Y" long or short. Should the angle at the crotch of the "Y" be closer to 45, 60, 90, 120 or 180 degrees?