I want to surprise my wife and take her on dream trip to Tahiti for around two weeks during September. Her dream is stay in an over the water bungalow. Open to doing a stopover in New Zealand or Australia. This will likely be our last major trip for a several years. I have a budget of $8,000

We've both got rewards all over the place and wasn't sure if I could leverage those in any impactful way:

1. 90,000 Chase Ultimate Rewards
2. 35,000 AMEX Membership Rewards
3. 60,000 Citi ThankYou
4. HHonors (Silver) - 83,000

Neither of us do a lot of travelling so we haven't really accrued much FF miles.

Any suggestions on how/where to start looking for packages or even just airfare? Any tips would highly be appreciated.

I've also recently an AMEX $400 statement credit for $2000 or more on Qantas earlier this year but did not jump on it (anyone aware if this is something that they re-offer?)

Thanks