We went a little over a week ago from DL to
Legoland.
We went with Grayline Tours. The bus picked us up from our hotel, then to their depot a couple of miles away, then we got on the legoland bus and off we went and the bus dropped us back to our hotel after, it was fantastic and would definately do it again. I can't remember how much it was, we got the package with bus transfers and ticket. But Grayline do have just the bus transfer available without the ticket. They have a
AAA discount too which we used, you just book and pay on the day to get that discount.
We go a brochure from our hotel concierge, they are open until about 11pm I think so you can book late for the next day (which we did).
Here is the link for transportation only
http://www.grayline.com/Grayline/destinations/us/anaheim.go?mode=activityDetail&apid=2611&sid=501&
Here is the link for the tour
http://www.grayline.com/Grayline/destinations/us/anaheim.go?mode=activityDetail&apid=1297&sid=501&