Interesting tables, but the problem with tables that do not rotate is that they are almost worthless for shooting in fields loaded with ground squirrels or prairie dogs that present a 360-degree field-of-fire that requires quick rotation of the table and seat combo for fairly close Whack-a-Mole type shots. Non-rotating tables will work for longer-range shots, but I don't see much use for them when shooting a field that presents shots at constantly varying wide angles, unless the shooter doesn't mind picking up the table, cartridges, rifle, seat, etc., and plunking them down again for that second shot. Rotating tables can also be used in the back of a pickup truck for 270 degrees worth of shots.
A table, such as one about 5' wide can be used with a bag, where the bag can be slid to the right or left, giving a chance at angling shots works well, but it is not portable. I have used this method with a small blanket under the bag (such as a Bull's Bag) that allows the bag to slide to the right or left, but again, this type of setup rules out good portability.
I now use a "walker" ---the type used by old people who have a hard time walking---that can be found in most thrift stores. It is very light and can be carried under one arm. The legs can be adjusted easily for height; a Protektor leather bag is placed on the top of the top front tube for support of the rifle, and I use a rotating tripod seat (also very light and portable). I bungee the seat to the walker, fold the walker and simply walk off the entire rig. The walker is so light that it can be easily be moved to the right or left, and the entire rig is cheap. I paid $5 for the walker at a local Salvation Army store and $14 for a rotating seat from Sportsman's Guide.
Also, I can shoot long-range because the rifle and shooter (me) are tripodded when the right rear leg of the walker is folded inward. This leaves the two front legs and left rear leg planted on the ground; hence, the tripod. If you take the letter "L" and turn it upside down, you will have an idea of what the tripod looks like from above. I recently put some wheels on the front two legs so that I can pull the walker behind me instead of carrying it. When not in use, the walker can be folded fairly flat for storage. I plan to try out the wheeled rig next month when I take the trip to ground squirrel country and will send in some pictures at that time.
This setup is great for .22 rimfire shooters, but will also work for centerfire rifles, provided that you don't have to drag along a lot of cleaning equipment, in which case, you have to consider something with a table to provide a platform to hold the rifle for cleaning.
