Reply by amyscakes

I rarely transport higher than 3 tiers assembled because I work alone and can only carry so much. typically I split a 5 tier into a 2 tier section and a 3 tier section. I do the bottom 2 as the 2 tier due to higher weight of the larger tiers. I never use a box, just a rubber shelf liner to keep cakes from sliding.

-- Amy, http://www.amyscakesncandies.com