Educate yourself and look at lots and lots of campers before making a decision. Think about holding tank sizes (they matter) and how big the bathroom is. Stand in the shower and mimic bathing and see if you need to be a contortionist to complete that task. Sit on the toilet and make the motions you make to see if you can do it with the door closed, you'd be surprised at how many are not big enough for what they are designed for. Think about where everyone will sleep and how much effort it will take to prepare multi use sleeping areas each night. Is there a real pantry available?. is there enough seating area for everyone in bad weather? Learn about towing capacity and what it really is for your vehicle (it is not the published tow rating). You will learn about GVWR, GCWR, RAWR, Tongue weight, payload ratings (biggy) and WD/Sway Control hitches. The more you know the more likely you will make a good decision the first time.