All of those type of screen rooms that I've seen are very fiddly to put up, don't seal out the bugs very well and are bulky.
We use a stand-alone screen room if we stay in one place for more than a day that fits a box that is 2'x8"x8". Here's a link. CLICK ME
It is light, inexpensive, easy to set up (less than 10 minutes), really keeps the bugs down and portable-you can move it over a picnic table easily.
It is also useful for marking your campsite when you leave for the day in your van.