Hi, We are a family of 4 adults - mum dad & 18 & 21 year old girls. We will be driving from Las Vegas to Grand Canyon and then back to LA on to San Diego, up to LA and on to SF. At present we have hired a Midsized SUV. I am just not sure whether this will give us enough luggage space I am expecting that we will probably have 4 goodsized suitcases and possibly some cabin bags. We have so much luggage as we are doing 43 nights and will be going from the extremes of Florida Keys to Niagara Falls so need to pack for all sorts of whether conditions. The girls are happy enough to sit closer together and we can then fold down one of the rear seats for extra luggage space. I am just not sure whether we would be better off hiring a Standard SUV. The midsized options are Nitros, Escape, RAV4, Jeep Liberties and the standard options are Equinox, Envoy, Explorer, Kia Sorrento, Jeep Grand Cherokee, Toyota 4Runner. For other parts of our travels we will stick with the Midsized as we are only using the car for a couple of days at a time but for this part of the trip we will be using the car for 21 days. Any suggestions would be greatly appreciated.