If you don't own your own venue it can be tough.  Of all the theaters I've worked, my favorite flooring, for building, is in my home theater.  We have a wood thrust stage that has a plywood top. Over that top is glued an upside down carpet. Edges are trimed with metal. Again, the nap is down and the jute is up. Over this we pour copious amounts of old/miscolored paint to seal it..  Our old floor had about thirty years of pain on it and had a pretty solid finish, but the stage had to be replaced a few years back and we had to start over. We still don't have a real good seal on it, but every show makes it better.  The advantages are that it still provides a solid enough surface for wheels (Real heavy wagons can cause ruts, but these can be "painted" out over time.) It provides a cushioned surface for prat falls etc. It deadens the sound of character shoes when they clip along the stage (of course if we really want tap we add a masonite cover) and most important for construction is that when we need to attatch to the floor (which is all the time) we just drill in a 3" drywall screw. When we remove it, the hole almost disapears and does self seal when repainted. of course over the decades, floor and cover will need to be replaced, but as I said we got about 30 years out of the last one.  it is very important to glue the carpet down thouroughly.. When we replaced the old stage we made the mistake of putting it down like you would regular carpet, albeit upside down. The first time we ran wagons across it the weighted wheels pushed up the carpet in front of it... I know its not for everyone or every situation, but all in all it has served us well...

If you want to find odd wagon breaks CHEAP, check out the attached surplus company URL.   Unfortunately the best true wagon breaks were already bought (including by me), but there is still a lot of cool stuff to consider.