Well the factory hitch is rated at 4500# GVWR and 450# tongue weight (when used with a weight distribution hitch)

The weight rating of the hitch has little to do with the rig. It is important to know and pay attention to, but only if your rig is capable of towing a rig that is larger than the rating of the hitch. You can put a class VI on a Metro, but it does not mean that it can pull 10K. <img border="0" title="" alt="[Big Grin]" src="images/icons/grin.gif" />

and was looking at a 26' ultralight trailer that comes close to that. The trailer was the Forest River Surveyor. is the factory limit realistic?

You need to do a bit of research. How much does the trailer weigh? What is it's distribution or how much of it is hitch weight? What is it's wet and dry weights? These numbers will be hard to find. Trailer manufactures do not seem to publish them and trailer dealers will lie about it. From what I have heard, they are more concerned with making the sale than making sure you are safe. Again, very important because by the time you add food, gear and water, you will add a good amount to the rig.

From a quick search on the internet, I am going to guess this trailer is around 4+k loaded.

You also need to see what the data tag on the driver's side door frame says on your Rodeo. There should be a front and rear axle rating along with a gross vehicle weight and a gross combined (vehicle and trailer) rating. Let us know, we can help you decode the meanings

Finally, you need to weigh your rig. You need to know front axle, rear axle and total weights. When doing this, you need to also account for a full tank, any passengers dogs and gear.

Once you know this information, you will know if the trailer is too much. My gut feeling is that trailer may be too much for your Rodeo when you are 100% loaded.

Good Luck,
Michael