I use an x-pen, but it can be kinda heavy, however the advantage of it is, I can open it up if there is a fence or a wall available - giving the pups more space to roam. I use it primarily in the backyard when I'm hanging out there since I don't have a fence, so for my situ, it works best for me.
I did debate getting that portable one above - which would be especially handy when camping, and IMO would work best for your situ as well.