@pezgirl Oh goodness! I guess I will get up on my stand now. Hahaha!! These are some of the best islands you will ever visit!! Apologize now if this is a little long....
First of all, like @CruisinUpinLife said, I would highly recommend going to Pinel Island. Below I have attached another page where I talked more in depth about it and added some pictures.
Curacao, we absolutely love this island. We have been twice and are going back in December. I have attached a map of the area below from https://cruisecrocodile.com/cruise-port-information/willemstad-curacao/#curacao-cruiseport. The blue bus on the right hand side of the picture shows where you need to pick up the city bus. I'm not sure about the blue bus on the middle/left side of the picture because we haven't taken it from that location.
Both times we visited, we walked from the cruise ship through town to the city bus and rode that for $2 a person to Mambo Beach. Mambo Beach is a wonderful, relaxing beach. There is an entry fee of $3.50 per person and the chairs are also a small fee but I can't remember exactly what it is. I believe $3 or $4 per person. When you are ready to leave, there are city buses waiting right there. Note: the city buses are small and the public transport bus is big. The public bus is $1 per person but it takes a while for them to fill it up so we went with the city bus. The walk from the cruise port to the city bus is about 25 mins depending on how fast/slow you walk. We use it as a good time to take in the beautiful, colorful buildings along the way! I added the map so you can use that to navigate from the cruise ship, across the pedestrian bridge, to the left along the water, and then a right which will take you to the public transportation area. The first time we did it, we had to ask a few people along the way but everyone was very friendly and helpful. There is a taxi stand closer to the cruise ship but if I remember right, a taxi is $40 to Mambo Beach.
Since we are usually there later at night, we love eating dinner on the island. We have gone to Perla Del Mar twice now and it's amazing. It is a Steak and Seafood restaurant. It is located in the Waterfront Arches which is to the right of the pedestrian bridge. There are 5-6 restaurants all on the water and I would recommend eating dinner there! We never feel unsafe walking around after dark. I attached a picture of the view from our table at Perla Del Mar! As you walk back to the ship you will walk through Rif Fort which is an awesome little places with bars and restaurants that all lit up at night with live music sometimes.
Aruba - it is only about a 5-10 min walk to get to the city bus stand. You can buy a round trip ticket to Eagle or Palm Beach for $5 per person. Great deal! We prefer Eagle over Palm because it is a bit quieter and not as busy. I will warn you that the chairs and drinks are going to be expensive but we just plopped our towels in the sand fo freeeee 😄
We were in Aruba late in January so we decided to get cleaned up after the beach and head to dinner on the island! To the right from the cruise ship, we walked for about 15 mins along the road (on a nice sidewalk) and ended up at The West Deck. I would recommend to make a reservation because they were quite busy! It is right on the water and had amazing food!
It was a beautiful walk back to the ship and is a really nice area. No feeling unsafe at all here either after dark!
Bonaire - the place we want to live eventually! We have fallen in love with Bonaire and actually stopped in and spoke with a realtor in January to see what it would look like to move here in the future! We took a taxi to Coco Beach in January because we didn't have any other plans. It was $2.50 a person each way. We just put our towels in the sand because we wanted to be in the water most of the day and we brought our snorkeling gear because there is some of the best snorkeling here in Bonaire! I would recommend bringing water shoes as the beaches here are quite rocky.
After hitting the beach, we were ready for a drink on the boardwalk near the ship! We love visiting Karels Beach Bar which is just a 5 min walk to the left as you get off the ship. It is over the water and offer beer, coffee, and a limited food menu.
Well, sorry again about the length of this post but as you can see, I am passionate about these islands and helping people have a great time without breaking the bank! I hope I have given you some good options! Let me know if you have any questions or need any further clarification!