The sand fleas bothered my daughter but not me. A good island strength bug repelent should work.
AKR or CoCo would be my choices for a return trip, I’ve been to Roatan three times. Depending on where you are leaving from look at flying into San Pedro Sula and then to RTB, it was cheaper the last time I was looking but that requires an overnight in San Pedro Sula to make the connection. Check with Roatan.com for packages too.