how to make a portable solar mount frame?

Hi,
I have been trying to find out how to make a portable frame for my two 80watt solar panels as don't want to mount them permanently. I haven't located any pics of this on the site for "portable" ones, only the ones where they were mounted permanently (mine only came with the permanent mounts so I have to make something and want it sturdy without being too heavy...) I saw this and wondered if it is easier to get something premade like this?

http://www.altestore.com/store/Solar...lt-Legs/p4711/

Next, is there a way open the trailer with them not permanently fixed, or do you have to place them on top after open?

Any suggestions would be appreciated.