Thanks for all the suggestions. I do have a moby but it seems cumbersome and too hard for disney. Also my first has been in the 10% so I might need an insert if this one is small too. I've seen the ring slings but they are even more confusing at to which one I would want since there are so many varieties! I sort of like something like the beco, tula, or ergo because if we wanted we could use it for awhile but some seem very hard to adjust little ones in the videos I've seen. There are just so many out there is hard to know what to do!
My ring sling is a Taylor Made, but it's a SolarVeil (no longer available). We also ussed an Ergo, but it was too hot and too complicated to use at WDW when we had to pop the baby in and out of it frequently.
Ring slings really are quite easy to use, and can be tied in several different ways. I didn't find them at all hard on my back with an infant, though once they got older I just stuck to using it to stabilize a hip carry. For a man, the rings can dig a bit at the shoulder, so I recommend wadding up the tail and tucking it under the rings to relieve that. (You put the rings forward of the shoulder, not on it, and on women that is that little dip between the collarbone and breast. On men that tends to be a more bony area.)
This is me with my youngest in our ring sling on Dumbo; this was her 2d trip at 6 mos.; the first was at 8 wks. Due to the ripstop jacket I'm wearing, the shoulder spread above the ring kept slipping, which is why I have the tail tucked under the rings. My hands are on the sling to hold it at a good angle for the photo; I didn't need them to support the baby:
I always found that when baby was awake and didn't need to nurse, a bucket carry was comfortable for both of us. In a bucket carry the baby sits cross-legged facing outward.
(BTW, that baby is now using a mini-sling that I made for her to carry around her AG doll when traveling.)
This site is European, but it has good video how-tos for getting baby into and out of the sling:
http://www.ellaroo.com/index.php/instructions/videos