Taking a baby (7 months) to Tonga

I haven't been to Tonga but I took my 8 month old to Rarotonga last year. Not sure if I will be any help or not but I can try! I had already weaned him so we were formula all the way - I boiled the water of course - I assume you have a kitchen in your unit? They are priceless!
My boy was crawling and learned to pull himself up on things while we were there so I had to take some time to do a quick baby proofing check on arrival. Most babies get a fever when changing climates so don't panic if he does but take a thermometer and pamol in case. I was a bit paranoid and took burn creams, conjunctavitis liquid and a bunch of other unnecessary things cause I didn't know what I could get if I needed it. I only needed the pamol/thermometer and his fevel came down overnight. There will be endless fruit for him which I'm sure he will love but I would take plenty of canned baby food to be sure. You don't want to have to cook too much while on holiday :) I don't know what the shops in Tonga are like but I could have gotten all mine in Raro but for a huge price - I have heard Tongan food is expensive so BYO :)
Oh and we took a baby back pack as it was so much easier to walk with him on rough roads/beaches etc. The stroller only got used in the airport! Any more Q's just ask :)