traveling to Marsh Harbor Bahamas. wondering what if any coverage Verizon has over there.
https://ss7.vzw.com/is/content/VerizonWireless/available-international-travel-services.pdf
Global & International Services | Verizon Wireless
Verizon has no native service in the Bahamas. It would be all roaming.
You don't say what phone you have, as not all Verizon phones can be used internationally. Defintely check out the Global services link above by naansalad
If you have an international compatible phone, There is 2G only coverage in the Marsh Harbor area. See map below: