Thanks again, everyone. I just had an idea. I like my stand, and i like being able to easily move the hammock to another room, but it's probably not long enough to accommodate a 13' hammock since it only spans about 9 feet. But...the stand is made of steel pipe and is in five pieces. I'm not handy by any stretch, but the bottom piece that connects to the legs is just a straight pipe. It seems like if I just got a longer pipe, that would make it possible to put that larger hammock on. The pipe is supposed to be attached to the legs with bolts, but I didn't use them during my initial setup and the thing felt stable.
Does that make sense?