IMO FWIW, if you are staying at a WDW resort, I would use their transportation. Using their transportation, you don’t have to worry about a PAT or a boarding group - Disney will assign one for you and it is generally one of the earliest PAT and Boarding Groups, but YMMV!
Also, from reading this forum, I saw that getting an Uber/Lyft to agree to such a long one way trip can be hard to find, might hit surge pricing, and/or require you to pay for their return trip. However, I don’t know that and YMMV.
I hope you find what you are looking for and have a great cruise!