Canadian preparing for an extended stay in the US

Here’s what I have learned so far, we’ll need to:

·         Arrange for an OHIP absence in advance so we don’t lose our health coverage – more info at http://www.health.gov.on.ca/en/public/publications/ohip/travel.asp
·         Arrange Health Insurance during our stay in the US & Bahamas
·         Apply for Nexus cards to simplify our boarder crossings
·         Obtain an Annual Customs & Border Protection CBP Decal at https://dtops.cbp.dhs.gov/main/login_internet.jsp
·         Investigate if a CBP Cruising Permit is required
·         Investigate the I-94 Arrival form for entering the US & I-539 Extension form to stay longer
·         Investigate potential US Tax issues associated with being in the US > 6 months
·         Extend Boat Insurance for our trip to cover US & Bahamas
·         Investigate obtaining a Credit Card / Bank Account for US currency
·         Investigate US Cell Phone / Data plan
·         Investigate Boating Safety equipment needed for the Great Loop

We’ve read about the Small Vessel Reporting System (SVRS) however it appears that this is not required if we have Nexus cards.

I'd appreciate feedback on my list to date, especially if I'm missing something!