I bought an aluminum tripod on e-bay that came with a ballhead made by Benro. It was only like $120 for the tripod and head. It's 3-section legs with twist locks.<sinp> It came with a nice bag with a long strap so it could be worn across the body, it's not TOO heavy (although it's definitely not a CF 1.5 pounder) and is compact enough when put into the case that it should easily go on rides with us (maybe 2 feet long).
LOL, I have 2 CF tripods and neither of them are 1.5 pounds! The lightest is 3.3 pounds which is still heavy when walking around DLR 12 hours a day.
I picked up a Slik Sprint Pro EZ in December...great tripod for under $100. It compacts to 18" and weighs 2 1/2Lbs, but extends up to 65" with 4-segment, independently adjustable legs.
Which Sprint Pro Ez did you get? I saw the 330 and the 340 on
Amazon. Didn't really check around anywhere else. Amazon description said they both weigh 4.4 pounds.

I'm just curious because I'm still trying to find one that weighs about a pound to 2 pounds and is stable enough for my DSLR.
A brilliant plan, unless (as I am) *you are* DH!!!
I only buy DW the lightest of equipment because it will end up in my pack!
Bob you are a good husband to carry your wife's stuff!
Since you asked about models of tripods, Velbon's Maxi 347 is a decent, light , inexpensive one (3lb, $110). The pan head is ok but clunky and should be replaced with a ballhead. The clamp is ok for landscape mode, about worthless for portrait mode. With a RRS clamp it is pretty good.
Velbon's 640 EL-carbon is a much nicer tripod and not even a pound heavier, but about $200 more just for the legs. The reason I bought this one is it has the largest diameter legs of any in it's class, it is good for loooong exposures. I still recommend a RRS ballhead, their smallest is ok for most lenses that I would actually carry for any distance.

Unless it's all about the lightest weight possible this is the one I usually carry (as on my February 2009 trip)
I bought the Velbon 530 Carmagne. It's a CF tripod w/ pan head and weighs 3.3 pounds. I took off the pan head and use a Manfrotto Midi Ball head. That sucker makes the tripod weigh more! But it's very stable for photography.
To the OP, believe it or not every time I bring my CF tripod to the parks, no one wants to help me carry it.

On my last trip, I brought my old el cheapo aluminum tripod that cost about $20 back in 1990 dollars

and my DH and DS didn't mind helping to carry that one around. (probably weighed all of 1.5 pounds at the most.) So I (as my DS put it) was the 'freak with the camera equipment' and either of them carried the tripod. We were able to go on all rides. One of them would take the tripod and put it in their ride pouch and I would put my camera bag in the pouch in front of me.
There were some photos that were blurred because I kept forgetting and touching or moving the tripod (that wouldn't happen w/ my CF tripod) but overall, the majority came out fine. (And it's digital, so I would just retake the shot.) I just made sure to keep a close watch on the set up so a strong gust wouldn't blow it over, and made sure to keep my camera strapped around my neck even when it was on the tripod. My tripod folded down to about 18 inches and fit in the DLR large sized lockers. Not sure if the WDW lockers are larger or smaller. Seriously, this cheapy tripod has given me some good mileage, especially for the price. If you go the cheapy route just make sure to leave your camera strap around your neck in case of wind gusts, and realize that it's a compromise weight/convenience over the risk of having a few blurry pics in case of movement/vibration, etc. If it's too heavy that you don't want to carry it, chances are you won't use it. I know this is probably an unpopular position on this or any photo board, but I speak from experience. I go every year, and every year I bring my CF tripods and it sits in the locker all day/night or I don't even bring it. Maybe I'll use it once for fireworks. This year I was able to use it for all kinds of long exposure night shots, and most of them came out great. Then I went to Vegas and walked around with it every day/night for photos. It was so light that it wasn't a drag to carry around.
Good luck.
ETA: You will not need a flash. I had a D80, brought the flash and never used it. It's too much stuff to carry around and will weigh you down. (Unless you plan on renting a locker and running back & forth to get the flash unit if needed.) If I felt I needed it, I would resort to using the on camera flash in the parks rather than carrying around the weight of the flash on the off chance I might need it.