If you're just looking to fish, head ~6nm directly south from Ram Head, St John. That will put you close to the south drop. There is a steep ridge of seamounts that rise to within 65 ft of the surface. The ridge is about ~2.7nm long and runs SW to NE. Troll along the ridge.

The lumpiest part of the St John to St Croix sail is usually the first few miles in the relatively shallow water south of St John. Once you get further offshore the seas are more organized with longer period waves.

For my crew comfort, I usually look for days with sustained winds below 16 kts (4-5 ft seas) with 13 kts being my sweet spot. If wind has been blowing 20+ kts for several days, you'll have 7-8+ ft seas for some time even if the wind has eased.