Most of the time I just use one of those Stanley plastic carriers that hooks under the panel and give you a good handle. I can carry a full sheet of 3/4" plywood with one. Notice I said "carry", not "enjoy carrying" a sheet.
In the shop I keep a couple of skate boards, a longer one and a short one. I often stick one under a sheet to move it across the shop. I have long intended to make one of those with a saddle and a couple of lawnmower wheels.
I also have a picture (or webpage) saved somewhere of a carrier like the Rockler one but made from wood. It was designed by a lady woodworker to handle sheet goods. I've had that picture for several years. If I remember right hers had a jack lift to adjust the height so she could slide sheets out of her station wagon onto the cart then after she got it in the shop she could jack it up to the height of her table saw or her bench. I recall it being very well done... I saved it for when I get old... I guess I better get started on one...
One difference I need is much bigger wheels at least on one end. My drive-way down to my shop outside walk door needs serious ability to drain water since it slopes down to the basement floor level. To that end we put in deep tile ditches and covered it with #2 crushed stone. The depth of the stone runs from a minimum of 2' to a maximum depth of about 4'. It works really great even in ripped open sky downpours. Its only downside is that it is not "little wheel" friendly.
Around here #2 stone runs from about ping-pong ball size up to about tennis ball size. A 10" O. D. wheel works fine and I can buy them for about $10 ea. either air tires or solid.
I did not equip with Shopsmiths in spite of the setups but because of them.
1 1988 - Mark V 510 (bought new), 4 Poly vee 1 1/8th HP Mark V's, Mark VII, 1 Mark V Mini, 1 Frankensmith, 1 10-ER, 1 Mark V Push-me-Pull-me Drillpress, SS bandsaw, belt sander, jointer, jigsaw, shaper attach, mortising attach, TS-3650 Rigid tablesaw, RAS, 6" long bed jointer, Foley/Belsaw Planer/molder/ripsaw, 1" sander, oscillating spindle/belt sander, Scroll saw, Woodmizer sawmill