Wow. I'd need a holiday after that! I've only been once to the Seychelles but the joy, for me, was pottering around enjoying the climate, the sun, the sea and generally not having a plan for my day set by hours.

A couple of thoughts. Victoria is small and not really that interesting so a couple of hours is plenty to see everything. We didn't do Turtle island but something similar in Mauritius and it was a real trip highlight. Source d'argent gets really busy so if you are going to bike then defo head to the E coast beaches as they are quiet(er)