Having replaced the wheels and tires on "The Toy" just prior to C3X I'm wondering if I should bolt the ralleys and old tires back on before tucking her away for the winter. Thoughts?

Either way I'll have a set of wheels/tires in storage. What is the best way to store them? Standing side-by-side on the tread or stacked on the side walls? Other options?

Thanks!

It may not help, but could not hurt to put the old ones back on. You may get flatspotting on the new ones, but it's not likely if the tires are full of air.
It does somwhat depend on the age of the tires, and if the composition is fully cured. It usually is.

Storing the old ones won't really matter how you stack them if they have air in them. There is too little weight to affect anything.