Yep! If they’re on well, they’re on. My horses live on sand 24/7. It’s not a problem.
The biggest concern with sand for me is it getting in between the shoe and the sole and causing pressure points. I have horses that tend towards thin soles so it’s a bigger concern. With the versa plugs, DIM, and/or some padding, it’s not a major issue for me. I don’t think it would be a problem at all for horses with better developed concavity.
Not a problem! The glues aren’t heat sensitive once they’re set. Heat can make the glue itself set faster while applying, so you’ll want to keep the tube(s) in something resembling temperature control when not in use and I use a cooler if I’m going to be gluing in super hot weather to give myself a little more work time. The superglue is much less finicky than the other glues and I honestly just keep it in my trimming kit in the tack room (not climate controlled, sorta insulated–it’s just a TuffShed). I’ve gotten fast enough now that I’m not super worried about the heat with the SG. I absolutely use a cooler/ice packs when doing anything with acrylic or urethane in the summer, though.
I’m in central valley of NorCal and we get up to 110+ during the heat of the summer. Glue ons do just fine, even if the rest of us are absolutely melting.