Isn't that what it was kind of meant for, and isn't that kind of exactly what you bought it for? It has plenty of memory to do what it was designed to do, and adding more just isn't going to get you very far.
You can go out and buy a new Prius, and just because you spend $250 and have a 10,000 pound load equalizing hitch put on it does not mean it is going to pull your 28 foot travel trailer.