A portable bath is a great idea but I recently went on my first camping trip too and I heard some sites have shower facilities. It might be worthwhile checking if the site has one so that you can just bathe them in there since they can stand by themselves already

Also important to consider how you are travelling, how long you’re staying for and how much space you’ve available in the van.
Have you thought about a portable inflatable bath, they’re light, easy to pack and reusable.
You can find them on Amazon, but ebay has great options too for example this one
https://www.ebay.com.au/itm/166842378497?itmmeta=01J80ZT8BYSVK84GW7ADZ0VJQB&hash=item26d894a901:g:nSAAAOSwW8pmfF6d&amdata=enc%3AAQAJAAAAwMxmj%2BiGvOveHXEBClPb29hQdmmLQ%2FDCb6524ku2%2FkaPj0bs5mH7yRhAvloFlqgMgDH%2FdYM5nWKT5XD5LqM%2B%2FBcgktsOHZ7mV0LQThKNMj84EXqNuRmZ8iMzqMloedi9dwXaKf%2F1LbsRDtuDNTHClyUH%2FgsJLUZiFSzBy1HCgempAjCxLpl3gt1V9SF2Xt01s5HH82VYhZyUCEm1ynJaztZOLfCETkEyZkPZsl738HwiHaAp76AEoAZT0ycnR39O7g%3D%3D%7Ctkp%3ABk9SR4aG6Z_AZA

Always make sure there is enough room for packing items.

A portable bath is a good idea indeed

We went with a portable bath.

Thank you all. I was leaning towards a portable bath was a good idea… but also didn’t want to be the person that takes everything!

You can get camping showers from bunnings or online, that hook up to a gas bottle. Another idea could be to have a rubber/plastic tub and fill it with whatever water you have access to, and a bit of warm water from a kettle if it’s chilly. Ive bathed in a plastic tub many times when I was a kid ????

Either shower (beach shoes are great!) or take a foldable bath tub. Also great!

I would bring a big tub with you, you can pick them up reasonably priced from Bunnings.

I love camping but grew up to not be so trusting of shared bathrooms (always wearing thongs!), so I personally would either bring a bath if they can’t stand the whole time or just make sure they have water safe footwear. A bath might be best for messy outdoor adventures