There's plenty of water for a 6 foot draft. Stay in the center as you pass Saba (to port) and then you're home free. Stay in the channel, and do not drift to port. Deep Bay can be still, but it's a great secluded anchorage. With Biras shut down, the beach should be a fun visit.

Pirates famously lured the British Navy through what appeared to be an impossible route past Saba and out of the Sound - using the 'S' path between Eustatia and Prickly Pear. I wouldn't recommend it on a bareboat.

But anywho...you're good to go all the way to Deep Bay.