Robert--
It sounds like you are on the right track! When making a longish XC, like from Memphis to anywhere much further than Nashville, after you check all of the stuff on-line and sort through the overload, give Flight Service a phone call an hour or two before you depart. 1-800-WX-BRIEF is their number. You can talk to a real person, ask questions and clear up anything you don't understand from the computer. If you've already done DUATS, tell him you want an "abbreviated briefing." Doing this a few times will help you figure out all of the DUATS information.
Haze is a problem east of the Rockies. There are summer days here when skies are clear but visibility will be just 3 or 4 miles in haze. As a freshly licensed pilot, I tried to make a short ~80 mile XC on a morning like that; at the airport, an instructor was going out with a student so I thought I would be OK. Initial climb to the west was good, turned crosswind, everything great. Then I turned downwind and the world outside disappeared; instead of calling "downwind, Runway 26, departing the pattern to the east" I called "downwind Runway 26, closed pattern", kept a close eye on the ground out the left window [the only ground I could see], turned base and the world reappeared.
I learned that day that haze is a very bad thing. Since buying the Mooney, I often fly above the haze; going south at 8000'-10,000' I have had the haze rise up and envelop me; I have come home above the haze, with the ground mostly visible in front, only to have it disappear on descent around 6000' and the hilltops not reappear until 3500' or less, with full ground visibility only at 3000' or below. [The hilltops are ~1300-1500', not counting antennas.] Fortunately this did not happen to me until after I completed my instrument rating, but I did log that descent time as actual--I couldn't see anything out any windows.
Visibility in haze is also variable, depending upon which direction you are looking. With the sun directly behind you, visibility can be pretty good, but the closer you look towards the sun, visibility decreases and can go to pretty much zero, unless you lean your head against the window and look just in front of the wing [not a good position for flying or maintaining VFR].
Study well, fly safe, and talk to a mentor. Let me know if you are ever up West Virginia way.