Tent Camping - Longreach/Winton?

Not quite in your specified target area, but a little south or Barcaldine, Lara Wetlands (private campsite) sounds fantastic and get good recommendations Lara Wetlands

For caravan parks, one of the most recommended in Australia is the Ilfracombe Caravan Park, 29 kilometres east of Longreach. We went there just to see, and I scored it very high.

At Longreach we stayed at the Longreach Apex Riverside Park Campground.
Four kilometres west of Longreach near an old and now closed bridge across the Thomson River, $3 per night, pay at Visitor Centre.

Two kilometres south is Long Waterhole free camp (unserviced). 28 kilometres South of Winton there is Bladensburg National Park campground.

There were no tents when we stayed at the Longreach camp, but mostly on river floodplain clay, I don't see it would be a problem.

Hmm.
Just looked at your dates again.
Early July.
Pack warm sleeping bags!
My dad and I first did the Qld outback in tents in July 2004. We fluked really nice nights for the entire 2 weeks. Very pleasant nights where we sat and yakked all night outside our tents.
My husband and I went through on our way to the Kimberley 2 years ago in July. We were in a camper trailer.
It was sooooooo cold.
The days are beautiful and it's the best time for outback travel but be prepared for cold nights-they can be minus on cloudless nights to maybe 10-15 degrees on cloudy nights.
But it makes those night time fires and marshmallows all the more yummy.
Robyn :)
PS: We've stayed at the caravan park in Winton 3 times now (I think there's only the one!). It's near the servo and trucks/road trains pull in at night but you really don't hear them (a big day of fascinating outback travel tends to cure most insomnia!) We have stayed there in the Easter, July and September holidays and have only had pleasant experiences.

We did this trip last year in all the rain they were having. I couldn't recommend Ilfracombe highly enough we stayed there and just travelled into Longreach to visit the museums etc. The park owner went out of her way to help us as all our bedding was wet and offered to dry it in their dryers not just the general laundry ones for campers and also offered if we needed to borrow blankets if needed.

In Winton we stayed at the Matilda and wouldn't again was a pretty empty park and were given a spot next to one of the only other campers there and it poured with rain (not their fault obviously) we were floating from the water but then sinking in the mud the next morning in the light the whole other end of the park was nice grass wet but not muddy. We met people staying at the Pelican who said it was very wet too but nothing to what we had and a bit nicer amenities. In Winton we only got to see the Age of dinsosaurs as with the rain we didn't want to get stuck there and the road to Lark Quarry was closed we left but my girls still loved it and now there is even more to see.

If you have time Richmond is gorgeous great park looking over a man made lake.

We drove from here back to Hughenden and out to Porcupine gorge which is breathtaking both in sight and walking back out lol but def worth it. You can also camp out here.

If you are worried about the cold and sleeping with your kids we put a rubber back picnic blanket down and our girls are in swags they were only $70 I think from Goodwoods. They are 8 and 10 now and been in them since they were 3 and 5.

You can camp a couple of K out of Winton. Drive out on the Winton Jundah Rd about 1.7k and take the first left to the long hole on the Western River. You can camp down by the river but it will be just about dry by now.