I am planning on doing the same thing and one quick question before you move.
Why not switch to a DSB during the move? (Might make things a lot easier.)
I am transferring a 75 gallon bow front and have a 55 gallon tank to make things easier. I am going to move the LR, fish, snails, and inverts with about 70% water from the old tank to the 55 gallon temporary tank. At the same time I'm moving the filter and everything else except the dsb and about 25% old water.
Once the fish and LR are all moved then I'll remove most water I can and leave the DSB in while I move the 75 gallon tank. It'll be heavy though!!
The fish/LR/snails and inverts won't be too stressed travelling in the 5 gallon buckets during the 5 minute car ride and using the same water will make things much easier.
I would seriously think about not using the crushed coral, it'd be a perfect time to do the switch.