I would like to do this trip in a roundabout way also. I was thinking if it would be easy to go to Vanuatu, Solomons, then up the east coast of PNG, Palau. Then I'd like to go to Guam then Truk Lagoon then back to PNG or Solmons and on the way checking all the smaller Micronesian Inlands. It's different to what most would be doing and maybe too difficult to do.
I have been told to get these books Cruising Guide to Southeast Asia Vol 1&2 By Stephen Davies and Elaine Morgan and then of course there's Jimmy Connells World Cruising Routes.
Hope this helps.