Don't forget to consider the interior roads in campgrounds. Sometimes the campsite is large enough but you may have difficulty getting to it. We have traveled all over the US and Canada in our 40 footer and rarely have a problem finding a campground. As so many others have said already, really depends upon where you want to go and how you want to camp. We are retired and full time so want a larger rv; if you are only going to go on weekend trips and want to dry camp in the wilderness, then you would likely want to go smaller. Or you may fall somewhere in between.