I like the way you think!The bigger the car, the more gear you will wind up carrying. Going bigger will not solve the problem, unless the problem is you want to buy more gear. Find what’s comfortable for everything else you do and force the gear to fit that. Not the other way around.
We thought that very exact thing about 6 months ago when we bought my wife an explorer. The kids (8,11 & 13) are all ready complaining that it's too tight.