robgendreau, I thought the rafting guys used these for durability?:
http://partnersteel.com/LG33.htm
http://partnersteel.com/LG33.htm
The finger pinching description I agree with - I use a pair of needle nose pliers to close mine up, and keep my fingers away from the latches.
But "single use"? - Unless it's #2, I use my Wag Bags multiple times (especially during the night), and tie it all up in the morning. They just keep on solidifying whatever you put into them.
I have never experienced any odor with Wag Bags, but by their very contents ... I too always keep the bags outside my vehicle if obliged to transport waste out of any given camping area.
I like the PETT because of how compact it all folds up to be (including the shelter), but in reality - it's absolutely no different than a paint bucket with a toilet seat lid on it!
robgendreau, I thought the rafting guys used these for durability?:
http://partnersteel.com/LG33.htm
Yeah, that's what we've used on both private and some commercial trips. Not quite sure how that fancy aluminum would stow; the NRS stuff goes in easily rigged rocket boxes and they are indestructible and cheap. Eco safe is the outfit that made the smaller kayak version I have; https://shop.clavey.com/ecosafe-boom-box-sea-kayak-toilet-system-p306.aspxSome commercial outfitters will use something like the Partner just due to the cost. Private trips do a variety of things depending on where they are going.
One of the most popular is the Eco-safe since it's accepted everywhere. http://www.nrs.com/product/73050.02/eco-safe-toilet-system
You can take multiple tanks for long trips or big groups but it takes two rocket boxes to pack it (tank plus one for the lid, etc.) plus another one for each extra tank. Bomp proof but bigger than other options. I've also used an unlined rocket box with a seat fit to it but that's a whole different cleaning experience RV chemicals, powdered bleach, groover tamer, all work for odor control.
The eco-safe/rocket box setup is accepted by NPS/BLM/etc. etc. They are pretty picky about your toilet system. For other trips that don't go through national parks you can get away with buckets with gamma lids or wag bags/pett. Another option I've seen is taking the bags and stuffing them in a pvc pipe with a threaded end. No stink and durable for river use. A lot of it depends on the regulations for where you are floating, but since there are very few like the eco, partner, rocket box, that can get used anywhere, most groups just invest in that and use it instead of switching around.
Generally though, I wouldn't recommend a rafting type setup for what you guys are doing. Rafting is a communal sport, large groups for multiple days so the toilet setups are big and heavy. Pett or thetford type are better for this.