To help try to prevent VSV in your horses? I just found out theres a case reported in my county, not sure where or how close. We dont go anywhere right now other than my trainers place down the road a few times a week to rope. He has horses coming and going all the time. I know the expo center put out a notice saying they had disinfected the premises and no community water troughs would be available on the show grounds at events. I bring my own water buckets and fill out of my trailer when we are over there, I keep my horses fly sprayed, I do that regardless, but since flys can be a transmitter I'm more vigilant. At home, my stalls are picked twice daily and horses are sprayed. My manure pile is a ways from the barn and my chickens spend their day rummaging thru it and we started hauling it off 1x a month to a friends fertilizer pit, I've noticed a huge decrease in our fly population since we started that. I keep fly sticks hung in the barn and have noticed theres not nearly as many flys stuck to it as in the past. I know there's not a whole lot you really can do other than isolate your horses until this thing passes. 

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I think you are doing most of what you should be. Disinfect, control flies, don't haul much/isolate. That being said VSV sucks but there are a number of diseases that are much worse in my opinion.