For the last 2 years, I've been to Seven Mile Beach Caravan Park. Its the one over the bridge as you head south, not the Discovery one before. It's on the beach and has the tidal river which is easy for kids to play in. Has a pool and basic camp kitchen, no playground, but a blow up air bouncy thing that seems to keep all the kids happy. Make sure you stay - beachside, the other side is pants. Lots of static vans and they cram in campers at busy times in between any blade of spare grass. This is also right on the river, so mozzie HQ in the summer. I've found that over Xmas, people re-book over and over - and it's pretty easy going and quiet by 10pm. Large camp sites, but the best are at the back behind the beach-head or along the river. Poolside is a bit of scooter and skateboard dragway. Book early and pick your spot -- it's good value and 5 mins out of town, so plenty of places to get food and grog.