Gocheifs58 a lot of members, whom I am sure are more experienced than me, think your truck is capable of a lot of trailer. I'm just starting out myself, and one thing I wanted to be certain of from the beginning is that I am towing within the ratings and specs. As I get more comfortable towing I might push the envelope, but as of today I am keeping it conservative.
A big surprise was that with a 20% safety buffer, the weight from the tongue, weight of passengers and stuff inside (floor mats, lunch, etc) we are close to the GVWR. In fact if we had another passenger on our April trip like I thought we would, I'd run it on only 1/2 a tank of gas to save weight. Thankfully we're not going to that extreme. One fewer passenger means we have more buffer.
So I encourage you to double-check the weights. Here is a good read, taken from the FAQs in the Beginner forum:
http://www.rv.net/forums/index.cfm/fuseaction/thread/tid/14369340.cfm