I average 1.5 -1.6 mpg on a typical Hudson canyon trip. Generally I'm burning less than 180 gals. It can be done on 150 gals. I'm generally not going directly there or directly home. Stops at Resor, AP, Texas Tower, Glory hole pots or Chicken canyon pots. Sometimes we go to the Toms Canyon.
Hudson tip from BI (not your dock) is 86 miles(statute). West Wall would be 100 miles. You can start at the tip and troll pots to the west wall and save gas.
If you have 4 strokes you probably have the range. From BI you are roughly 90 miles from any canyon..Hudson, Toms, Lindenkohl, Spencer, Wilmington.
Lots of great stuff short of those to stop at. Don't have to go to the canyon to catch tuna and mahi.
Start working your way out. Get your boat geared up. Pick a FLAT day/All Day forecast.
Have fallback plans to shorter spots. Make the run if the forecast pans out. Don't overstay your welcome.