IDK, looks like it would work fine, but I think the PETT system I have is more practical. It has been very useful. Used it camping and off-roading. My daughter took it on a cross-country (Maine to Cali and back) road trip last year. I've also used it during prolonged power outages at home.
Sure beats trying to find a suitable blow-down to hang your butt over in the middle of a rainy night. I'd keep a supply of WAG Bags on hand for disposal.
Regards,
Michael