Outside, I will normally peg mine it. Haven't had a need to do so on concrete or asphalt.
As for the ceremony, you are probably correct. I would get a golf umbrella and rig it up to stand guard over the equipment until zero hour .. then collapse it and stow behind. If there was a chance of rain, I would push to have something over the equipment (and a few contractor garbage bags to toss over the speakers if necessary.
As for the ceremony, you are probably correct. I would get a golf umbrella and rig it up to stand guard over the equipment until zero hour .. then collapse it and stow behind. If there was a chance of rain, I would push to have something over the equipment (and a few contractor garbage bags to toss over the speakers if necessary.