Many years ago we took a Mears day shuttle from All Star Music to Universal Studios/Islands of Adventure. I believe I called Mears in advance of our trip to arrange it (or now that I think about it, I might have made arrangements with Mears at the Orlando airport when we arrived), and they told us what time the shuttle would be at the hotel after we scheduled the date. Then, once we were at US/IoA, after a certain time of day I believe they had shuttles every hour back to the resorts. If I remember correctly (and it's been almost 10 years now!), we were picked up in a motor coach/bus type of vehicle, and returned to our resort in a smaller van. The cost was $12 per person, I believe, but again, that was about 10 years ago so I'm sure it's more now.