Good luck. Nauru is not a common destination for people heading through the South Pacific since it is a very unattractive island because of the mining and the anchorage is not very good there. Also you need a pretty big boat to be able to accomodate 6 or 8 guests and their gear. A final thought, going to Banaba is pretty much exactly to windward, so even though it is not so far in terms of distance it would be a fairly rugged trip. Sounds like you might need a good-sized powerboat for this.
Back in the water in Grenada - with new main and #2 and cockpit canvas (Santa came early). Will spend the winter and early spring in the Caribbean and then head to Bermuda and the northeast US. Still trying to decide if we will bring the boat to Canada, either in 2015 or 2016.