The Las Vegas Motorcoach Resort in Las Vegas has stopped offering help (several years ago). I'm assuming that there were liability issues. They will take you to your site then off they go. I would rather the 'helpers' stay away and let me and my co-pilot take care of it because we have it down pat. :)
Even if I'm by myself (travel alone occasionally) and there is not a person to help, I will pull out my red cones and put them in strategic places to help me guide. That has worked really well for me.
Safe travels,
MM.