Anonymous view while developing without quit maintenance mode
This is exactly what the Maintenance Exempt module was built for. From the project description: 


  This D7+ module allows specific people to perform the necessary testing on the site with all role combinations without opening the site up to all of your visitors.
  
  Exemptions can be added by:
  
  
  Specifying a list of IP addresses (individually or by CIDR notation)
  Specifying a query string variable