frumpy
Explorer
With a small vehicle and two occupants (plus two dogs), you do need some interior space. It is likely this can be accomplished with a very light roof load. Your roof load should never exceed about 150lbs. I never run any roof load if possible. On my latest trip, I kept the roof rack on the JK and hauled some firewood with it.
Consider putting light, bulky items in a lightweight rack (like the FrontRunner aluminum racks or the new ARB aluminum). Tent, sleeping bags, pillows and chairs. Get everything else down low, and far forward. With the dogs, you can fill the rear footwells with tools and water (properly lashed). In the rear, store cooking and camp gear, recovery equipment and personal effects. Again, put the heaviest stuff far forward (closer to the rear axle) and low.
The Liberty is a small SUV and it looks like yours is near stock, which will help with vehicle dynamics too.
Very good points, and the liberty isn't the most roomy SUV. If I go with a roof basket I was just planning on welding up something out of 1" square tubing thats 42"x48" or so. I think the biggest problem I have right now is mounting the gas and water jerry. I think I may just slowly start building the trailer for the bigger/longer trips.
Also, the box on the trailer is a lot larger then the frame (box is 4.5'x6.5') so I could either stick with that size or go smaller to about a 36" wide box which would also give me the option of a rtt in the future.