Further reduce weight by using
carriage bolts with washers and wind nuts to secure the top to the base. Take it apart for transport. I love the thinking of DIY that is shared with the Net. Good job and thank you.
My shooting table (for comparison) is a heavy beast of 4' x 4' x 3/4" plywood, three glued legs of 4" PVC, 22.5* bends, and 4" x 3" PVC closet flanges. It is one-man "transportable", by "rolling", but requires a PU truck bed, hitch mounted expanded metal shelf, or trailer to haul it. Storage is problematic as it take up space.
My plywood is cut similarly, significantly wider, left and right hand (Spousal Unit is LH, I'm RH), and all edges are belt sanded smooth. I used to paint them and leave it in the woods. Weather always rots them out in two to three years in the woods. I think I am on my fifth...
Seeing yours, I don't recommend mine. I would ultimately like a permanent concrete bench, but building that "in the middle of a farm road" around which I would have to negotiate a tractor, disk, and PU Truck is problematic.