The header text is too close to the top of the page
mention where it is (where is palm beach?) at the top where it's easy to see along with either a contact link or the information itself if it's simple (i.e. tel. number)
ditto: textv should be left aligned and also needs more space around it
menu is a bit on the large side and lok into using a css styled list for your navigation (something like
http://css.maxdesign.com.au/listamatic/ or similar)
you have nce photos but why is the site so dark and colourless? is this a reflection of the park? i doubt it

don't make it as colourful as the parrot in the first image but find some suitable colours - maybe the sand and blue from the ocean/sea - white background with a light sand side bar for example or blue sidebar (navigation) and sandy footer
you could do with a logo - i know a guy that makes them
doesn't St Georges basin have an apostrophe in it?
DHDdirect makes some good points about what users want to see - talk to some caravanners and see what they look for in a site.
also list your top 3-5 selling points at the top of the page before your intro text
the borders are a bit heavy and makes everything look boxy - and i hope you're not going to use tables for layout
have your call to action i.e. book now as a clickable button top right so it's easy for people to act on the information when they've made up their minds
have some testimonials
a good start but would welcome a (good) designer's touch
