I had to move my train table recently. No, I didn’t have the foresight to put wheels on it. So I had to resort to using furniture movers.
After putting the fuzzy protectors on them, they glide fine on the concrete, without fear of damaging the plastic sliding surface. They might slide alone on concrete too, but I don’t want to scratch the movers up, because I intend to use them elsewhere too. Some online reviewers reported that scratched movers scratch wood floors.
I just lifted each leg of the table, kicked a mover under it, then went around to the next leg. A pair of 4×8 tables is still awkward for one person to move, but if you’re not moving too far, you can do it. If you have help, you can get more ambitious.