Saw Horse Supports [Rockler] - brackets that slip over the saw horses and hold another 2×4 or two for supporting the middle of the table. A four-pack of steel brackets runs around $13.
Doesn't get any easier than this! I'm making a set for use outside from PT lumber and I can just leave 'em out there! Efficient use of lumber as well. jayscustomcreations.com saw horses
Sawhorses are an essential construction tool, and this article highlights 5 of the best—3 DIY designs, with complete plans, and two off-the-shelf favorites.
Product workshop saw horse
How to make a saw horse
Free DIY Project Plan: Cheap, Strong, Stackable Sawhorses
Plans to DIY a nice folding sawhorse with a shelf. It can be a horse, table legs, armour rack and more. This will work great for LARPing/camping and it's easy to fold down for traveling. -
Knock Down Workstation Plans - Workshop Solutions Projects, Tips and Tricks | WoodArchivist.com