jburch02,
If you see this before you go... would you mind asking them if they are open on Sundays? BVIYC told me they are closed but I just wanted to double check.

I just checked the specs on the Unite mifi and the info Digicell gave me and it looks to me like the device should work on their network. I might try it next time. It looks like ATT and the passport plan is a good fit for you.

Life involves risks, take some prudent ones (NOT with the BVI ferries)!