I think Navionics
is probably the best charts for the area. Have you turned on the community edits? Most all of the major hazards have been marked along with 'safe passages' in some areas. I never expect the depths anywhere to 100 percent accurate. There are areas that show 7 feet , but when I sail through them it was 70-80 feet. I have yet to have our track go over land, so I think that they are GPS
accurate at least. This is our second year in the Sea. Enjoy your time, we sure have.