So you made it somehow to Raiatea in French Polynesia, Congratulations!
Hitchhiking around the island
It is a small island and not much populated so hitching around is a great activity to get to know the locals and the island.
I found it more difficult than on Moorea or Tahiti but it is easily possible. You will find sooner or later a ride and people tend to drive a bit further than where they wanted to go to. It took me about 4 or 5 hours to do the whole loop but with plenty of stops to take pictures and looking at sites. One driver was very friendly and he gave me a good touristic drive with lots of information.
Especially in the South there are not many people living and I was walking for one entire hour. Not because nobody stopped but simply because there was NO SINGLE CAR (going my direction). This was Saturday 11am.
But yet again, no need to worry, sooner or later someone will be driving past and this car definitely will stop and ask what you are about doing here.