Van:
There are places where there are lobster pots every 50' or so and places where you can take you eyes off of your route for a few minutes at a time and be ok. In the 50' spacing areas I would make a course correction every 30 seconds or so at 5 kts as I worked my way though the field.
Take along a wet suit, shorty is ok for summertime, a dive mask and a serrated knife to cut the warp.
David