cargo carrier

I know that towing voids the warranty. But, does anyone know if it's ok to to use a hitch-based cargo carrier? They make a class 1 hitch for the 2010 Insight: Curt Trailer Hitch for Honda Insight 2010 - 11051 and there's a cargo carrier that fits it: 20x48 Cargo Carrier Fits 1-1/4" Trailer...