A toilet in the trailer is a nice thing at 0-dark thirty when you really don't want to get up, get dressed, walk/pedal/ride however far to the nearest bush/portatoilet/restroom, return and, now that you're wide awake, go back to sleep. A portable camper toilet will suffice in a utility/cargo trailer and could be viewed as a luxury. Been using this since '02... It's about the smallest on the market, 8L capacity, and they're getting pricey. I only use it at night if having to get out of bed or whenever I'm fully dressed in riding gear and pressed for time. Used like so, it will more than last a weekend if you hide it from the women folk...they will fill it on day one with excessive amounts of toilet paper, piss and endless attempts to flush said excessive amounts of toilet paper.