Maybe i am overthinking this, but we are getting ready for a beach trip next month and i am confused,

Should i get a swimsuit with a "reusable swim diaper" or the disposable swim diapers or can i just use a cloth diaper with the insert removed?

LO will be 15 months. When we swam last summer we used our cloth dipes (bg 4.0s) with no inserts and a rash guard. It was great but it was for short swims in the pool so i dont know if i need more for a longer outing,
Thanks!