Hi Tweeni,
Only you will know what's best for you and your baby and if you feel up to a holiday then go for it. You're much younger and fitter than me, so perhaps you will bounce back and be back to normal in a few days after the birth.
Personally the thought of flying within a few weeks of giving birth would scare the hell out of me. It took me ages before I could even leave the house with DD - so many things to take - spare clothes, nappies, wipes, muslins, hats, sling. I was sore and sleep deprived and it was cold and I wanted my DD to stay in the protective cocoon of home.
I would have hated to put her on a plane with all those germs and would have been petrified of not having enough stuff with me - my DD could wear 8 or 9 outfits in a day due to nappy leaks/possetting. I would have worried about the sun, the foreign germs, if they sold the only nappies that suited DD, if the detergent would bring her out in a rash, if she got a cold or needed the HV.
If I'd had to pack a suitcase and try to take into account all eventualities I would have just not been able to manage.
It all seems ridiculous now, but those first few weeks after birth are so hormonal and tiring and it can all seem very overwhelming.
It's very easy to get fixated on the birth, but afterwards was much more of a shock.
I do hope you manage to go and enjoy it, especially if you have some help. It will be a huge relief not to have a bump (PS you will still have a pg-like jelly belly, so don't pack a bikini!)