I’ve made several trips to the Solomons, and while I try to arrive at most destinations a day or two early, I’ve never been overly fond of hanging around in Honiara. You might consider spending your extra day in transit in either Brisbane or Nadi, locations that I enjoy immensely. It’s been several years since I had the pleasure of sailing on Bilikiki, but in the past they’ve provided shuttle service between Henderson Field and the dock, and it was not unusual for many of their guests to arrive in Honiara on the day of embarkation. You might contact their office directly to see if this remains their practice, and they may be able to provide you with recommendations for local accommodations should you choose to spend a day or two in Honiara.