We are entering the planning stage for a trip to the Grenadines between March and May 2015 for a ten day charter. Four couples and we’ve contacted both TMM (repeat discount) and Horizon about their four berth four head catamarans. We would like input about positives and negatives with the following options;

1. One-way (Horizon) from St. Lucia to Grenada?
2. One-way (Horizon) from St. Vincent to Grenada?
3. Round trip (TMM) St. Vincent?
4. Is the weather still okay 4/15 (Horizon low-mid) and/or 5/4 (TMM low-mid)?

We’ll probably want further advice on travel once we decide on charter options from you seasoned Grenadines sailors. Thanks!!