Depends on your travelling group (kids, older parents?) and their ages, how active they want to be, etc. We have done a Baths trip (with 2 older sons) on our own, and it was great. It is, however, a decent amt of walking, and you need to be moderately physically fit, so my mom would not have been able to do it with us. She would have had a hard time with the walk down to the water area for starters, and then would have trouble with the trip through the caves/rocks. For St John, we have gone to Megans Bay for a beach day(super easy to get there, inexpensive, low activity level), and twice we have gone on the Disney excursion 1/2 -day catamaran sail and snorkel. We all loved the excursion, as it fit the boxes of what we were looking for that day. As long as the weather is good for you, I dont think you can go wrong with whatever you choose!