Had the same frustration as you. Got tired of lugging mine around so I made what I call MFT Horses. I've posted about them on here before so I apologize to those of you who have already seen them.
Top is a simple box that has clamp/dog holes machined into the surfaces
It attaches to Dewalt saw horses using standard miter saw brackets.
I chose to laminate mine so I could use them more for Glue-ups but they're simple enough that the top could also be sacrificial. Just make another when it's too far gone. Here I used my first on to assemble the second -
I use them so much that I added paper rolls to them so I can paint, stain, and do other things which would typically hum up the surface.
They've become a very versatile part of my workflow in the shop too. I use them to stack materials as I'm working through the machining steps, use them for assembly, and finishing as well. I've been tempted to make a couple more.