Adapotato....
You may want to rethink your plan for many of the reasons others have mentioned.
Provisions for insurance has kept me in Grenada for the last 5 months at Port Louis Marina south of 12 degrees 5 minutes north. There are very limited options for sailing if you are restricted from Carriacou and the Grenadines and points north.
Trinadad and
Tobago are options, but pirate activities out of
Venezuela have kept many from sailing south or even sailing west to the ABCs. There are provisions for sailing from Grenada to Trinidad coordinating with Grenada and Trinidad Coast Guards. Also, many insurance companies require you to stay at least 100 nm north of
Venezuela waters if you travel west from Grenada.
In other words Grenada is a great
destination to a nice Caribbean island. Being limited in movement from June 1 to November or even December 1 may not be ideal.
If you are an American boat needing to
dock during your stay is Grenada and need 60hz
power, the only marina to offer 60hz is Port Louis Marina in St. George‘s. Although it may be the nicest marina in the Caribbean and certified anchorage up to a Cat 3
hurricane, it is also one of the most expensive marinas in all of the Caribbean.
Based on my experience of a 5 month transit from
Florida to Grenada, I would say the best sailing is right in your back yard in the Bahamas. Being close to the US is also a big plus since importing anything into the islands of the Bahamas or Caribbean can be a very expensive nightmare. If you need quality boat work, done in a reasonable time with good
parts availability the US is the place. The labor (i.e., $20 US per hour) in the islands is
cheap and the
parts art either unobtainable or outrageously expensive.
While the Spanish Virgins, US and British Virgins are great sailing grounds. You have to get there and that not an easy task as previously mentioned in this thread. The Grenadines are also a great sailing ground. Again you have to get there.
Hopefully this sliver of information may be useful. I would recommend you continue to gather lots of information prior to firmly committing to you plan so you know exactly what you can expect.
Best of luck.