Jeff:

I do not care for the hitch-mounted carriers, but if you do get one, use a bag such as the Rola (http://www.amazon.ca/gp/product/B000E7WLJW?psc=1&redirect=true&ref_=oh_aui_detailpage_o05_s00).  

I used the Rola in the cargo tray over the cab on our dinosaur inspired wanderings from Calgary to New Brunswick last summer.

On 06-Jun-2015, at 22:35, Jeff Palmer wrote:

> First out of Province trip with the kids (4 and 6) this summer. We have a fair bit of gear and I'm looking for a bit more space. Options seem to be a rooftop carrier, motorcycle trailer or hitch mount cargo carrier like this:
> 
> http://www.princessauto.com/en/detail/53-1-2-x-19-1-2-in-aluminum-hitch-mount-cargo-carrier/A-p8547317e
> 
> Anyone have experience with either of the last two? 
> 
> Thanks
> Jeff
> 
> Sent from my iPhone