The best way is stack them, cover them, and tighten.
A chair pallet is always handy (the protection of the first chair of the stack is less critical than in folding stacking chairs operations, but VERY useful).
With our chairs, we use plastic custom made pallets, or regular wood pallets with pallet shoes that secure the first chair of the stack to the pallet itself.
A chair pallet protects the first chair of the stack and eases up stack handling with both hand-trucks or pallet-jacks.
Some of our customers use PE film to wrap the chair for storage or transport.
Bright side: PE film is cheap.
Problem: using PE film protects the chairs from the warehouse to the customer, but very seldom workers take the same care in packing to bring the chairs back from the customer to the warehouse after the event.
We supply covers, which are strong, protective, and easy to use for every chair move (both to and from the customer). When you are using a cover: that's it, chair-handlers must use it every time, even for re-pack from the customer to your warehouse, because it is there, and it is easy to put on the stack.

Picture showing a compact 18"x35.5"x70.5"h 2 five chiavari chair stacks shipping/warehousing unit (tot. of 10 Chiavari chairs), with cover. It fits virtually on any van.

		New "pallet shoes" for Chiavari chairs, secure the first chair of the stack to the pallet. On 48"x20" wood pallets, we fit 2 stacks of chairs back to back. A similar pallet can be moved easily with a hand-truck as well as with a pallet-jack. A 48"x20" pallet fits 5+5 chairs or 6+6 chairs, depending on the truck you are using.
		CR CHIAVARI Chairs stack so nicely that we have to remind you: higher stacks are more unstable than short ones. For static stacks, the number of chairs in a stack is not an issue, but if you are moving your stacks, do not exceed in the number of chairs stacked: SAFETY COMES FIRST, ALWAYS!!!! Final warning: do not attempt to make similar high stacks with woods.