Welcome to CF....
Antigua is pretty much smack dab in the middle of the hurricane
zone. Is there a reason you want to lay up there? Although some people do, its definitely not a common place to lay a boat over the hurricane
Why not take a 3 day sail down to Grenada
and lay her up there. Although its still on the edge of the hurricane zone, the statistics are much better. The boat yards in Grenada
are very secure and all offer chained cradles and tie downs. Not to mention the boat yards in Grenada are probably much cheaper.
If you need to lay up in Antigua, then I have also heard good things about Jolly Harbor Marina, but have no direct experience.