I would suggest you add the extra excurison once you get onboard. Most of these have space and if not the waitlist clears about 90% of the time anyway. That certainly is the easiest way. Unless you want to do the whole thing again!!!
🚢 Cruise with your favorite Keene Luxury Travel Staff Member! 💰 5% KLT Reward plus Shipboard Credit available (amount varies per voyage)! 💲 Offering Enhanced KLT Rewards on voyages hosted by Ngaire & Clay!