The most important thing of all - keep your speed reasonable. Especially since first time towing. I'm talking 55-60mph. Oh, and your trailer tires are only speed rated to 65mph.
Put the max tire pressure in your tires. Being an 09 model trailer, your tires are over 5 years old. Inspect them CAREFULLY for any signs of dry rot/cracking or damage. If you find any, then you need to put new tires on it before you hit the road. In fact, I'm not so sure I wouldn't put new tires on it anyway.
MAKE SURE you adjust the hitch correctly. You can't just slap it on and expect it to be right. There is a sticky in the travel trailer forum on how to set up a hitch properly. I can't stress enough how important it is for you to do it correctly.
Air your truck tires up to max pressure as well.
Plan on hearing that 5.0 sing all the way home, but it will be OK. Just take your time. And yes, you are likely maxed out on all your numbers.