The Vs come from the ATV section at Cabelas.
Here are two options.
Options 1
The Fold UP Cart is quite popular in Phoenix.
If the link does not work, just go to the Lee Valley and search for cart and have a look at the folding one.
They fold up very narrow for transport.
http://www.leevalley.com/en/garden/page.aspx?p=69559&cat=2,44639,33270
Option 2
I have built four like this. This one just happened to be for three gun but mine is set up for my FTR rifle on one side and spotting scope stand on the other side.
The seat folds up so you can get at your 5.11 range bag.
I know it looks a bit like a wheelchair but it seems that if I am not in it someone else is all the time so it can't be that bad.
I know the shotgun barrel is not secured at the top but the customer wanted a picture of it that day.