I would stick with my toy train 4x10 or a 5x10. I've been doing some accessory wiring before the garage turns into an oven and it's a pain in the rear even though I elected to keep the wires up top instead of running them underneath the table. Velcro hooks hold to the outdoor carpet covering quite nicely and help keep it organized. Too old for that foolishness of crawling around down below and anyway that space is occupied by various hobby plastic tubs.
Pete