I am going to the beach soon with my 5 month old DS. I have a one piece, a pair of trunks with a long sleeved SPF shirt, and I also have re-usable swim diapers. I think I went overboard, wondering if I should return any of it. Or buy an extra of one kind in particular?

Which do you prefer for your LO?

Also, if I use the swim trunks, do I put a regular diaper under or the re-usable swim diaper?