I love the tent and shower in a can from the expansion. In vanilla ts3, I always wanted to camp out, but my sim didn't have a place to sleep=/
Now my sims can stay for weeks at one spot, as long as they have tents and a portable fire pit(showers are optional). Bring on the family camping trips!
One thing though, they're aren't any portable bathrooms, although I don't know if this is a problem.
I had one sim(without steel bladder) camp out at a fishing pond for weeks, and, while he was filthy, he never had to use the bathroom(his bladder meter stayed full). Even if it wasn't that way, it still isn't too big a problem, as I can just let my sims wet themselves, and perhaps use a shower in a can. They'll get negative moodlets, but that's just a simulation of real life camping-not everything is comfortable.