Will this work? Opinions, please?

[bling19572010]

My family and I will be in St. Kitts (Basseterre) on Friday, April 26th from 8A-7P and I would like your opinions on our itinerary. I would like to get a taxi at the pier and have our driver give us an island tour. How long would that typically take? After our island tour, I'm sure that my mother and dad (both in their 70's) will want to go back to the ship and relax but I would like to be able to do some shopping and have some beach time with my sister. What shopping is very close to the pier and what "nice" resort (day pass required or just a nice beach with lounge chairs/shade and restrooms) would also be close for a taxi to drop us off and pick us up from? I would love to hear your thoughts on this itinerary and also what others have done in St. Kitts. Thank you!!