If you let your plant wilt due to lack of water, then water, then let it wilt again, then water there is a good chance you will have some "Blosson end rot" (dark spots on the bottoms of the tomatoes) Common in container tomatoes.
Whether in the ground or in a container, I suggest you use a moisture meter to check when to water. The small tomato plant you see I just planted about a week ago and I have some empty containers ready for new plants. I like to stagger them so they just keep coming.
Any difficulty finding "Sweet Success" seeds to plant, let me know.