Rob,
If its going in the back of a removalist truck, I'd probably go the extra step or two.
I buy a couple of the moving blankets (I think bunnings sell them). One of these goes between the playfield glass and headbox (folded down).
As PBP mentioned, all balls and anything loose I put in a zip lock bag and zip tie to the loop for the coin box.
Once the game is folded and on its backside, I will wrap another blanket around it, followed by numerous rolls of the shrink wrap to keep it all together. Then I'll buy some large removalist boxes and cut them down to put over the sides of the game, then another few rounds of shrink wrap.
Make sure they are insured to max value with the removalists.
