1000 pounds of extra stuff is not a lot. The average RVer adds 1200 pounds over manufacturer dry weights, including RV options and mandatory options.
Payload will be one problem. Check out what your vehicle has as equipped by locating this sticker by opening your driver's door.

That has to support your family, any cargo inside the Armada, and trailer tongue weight.
Next, you mentioned buying a receiver. You may not have the big tow package which means lower tow rating. Check your owners manual and possibly the winder sticker to know if you have it.
There are books on all the hings you can, and should get. Start browsing the [url-http://www.rv.net/forum/index.cfm/fuseaction/listings/forum/28.cfm]Beginning RVing area. Search for topics you are wondering about, like generators, equalizer, etc.