In many countries there are severe restrictions or even bans on wild camping – for example in North America.
Before traveling to the respective country of your choice, please inform yourself about the topic on official tourism websites.
If a country, such as New Zealand, allows wild camping, vehicles should have, among other things, a toilet and water tanks and be officially certified as self-contained. Whether a motorhome rental company offers such vehicles, you can find out on the website of the respective rental company.