I wouldn't do it with the sand in. How much extra time are you working to spatula it out, put it in a few plastic bowls and then lay it back in, not much, 10 minutes?
For the rocks & verts pick up some styrofoam boxes at your local fish store, usually glad to give them to you. Put newspaper, about 4 layers thick lining the box(es), throw a couple cups of water to totally wet it on the paper, lay your stuff in and wet paper on top of it all, transport so it does not rock & roll!
I have transported tanks with solid wood underneath the tank but always with towels sandwiched in between the board(s) and the tank, doesn't need to be boards as long as it's a solid base and then the cushion to the tank.
I would reuse all the water if it's in good condition and the tank is not do for
a water change.
Yeah, I bet being only ten minutes away is making it very tempting to try and do it all contained in the tank, but if you feel that lucky maybe it's time for a trip to Vegas!