You don't state what your tow vehicle is, so I can't comment on whether the Cedar Creek is appropriate for your vehicle. As far as length goes, I moved up from a 30' fifth wheel to a 37' two years ago and can honestly say that it doesn't handle all that different. The only problem with longer trailers is the availability of sites. We used to be able to call last minute with the 30' and always find a site. Now with the longer trailer, most campgrounds in our area have a limited number of sites that accommodate larger trailers and we need to plan well in advance.
On the pin weight, I would almost be concerned to only have 1800 lbs of pine weight on such a large trailer. I had nearly that much (1600 lbs) on a 30' trailer that only weighed less than 9000 lbs fully loaded. It is much easier for the tail to wag the dog with a light pin weight. The other side of that is for the trailer to be balanced enough to have a light pin weight, the axles must be fairly forward which will make it maneuver better in tight spots.