Go in with low expectations, and you’ll probably have a good time. Here’s some to start with:

You’ll be sore from walking. Sleeping might be uncomfortable or cold, or wet. Food will probably be crap, or hard to cook. Animals will freak you out in the middle of the night, or try to eat your food. You’ll smell like smoke (unless it’s a fire ban, then you’ll be cold). Taking a dump in the bush is not comfortable, even after you get used to it.

It’s type 2 fun though, so it’ll be good in hindsight. Also you’ll probably see a bunch of beautiful shit and maybe get to swim somewhere nice. Just gotta give it a go, and see if it’s for you. Personally I love it.