Do you know that there is free non-stop bus transportation between parks? The only exception is between Epcot and MK: the Epcot Monorail runs between Epcot and TTC, and monorail or ferryboat between TTC & MK. You should plan on at least an hour going between parks, with walking to the stops, waiting for the bus, and going thru the bag check and turnstiles again.
If you prefer not to wait for the bus and would rather use Uber/Lyft, both services can pick up & drop off at all parks, except, again, MK. From MK, you need to get either to CR (walk or monorail) or TTC (monorail or ferryboat) to access the rideshare services. At TTC and the other 3 parks, Uber/Lyft pick up near the taxi stands. Except for very peak times (after fireworks), there are always drivers waiting in a designated remote corner of the parking lot, so your vehicle should arrive within 5 minutes.
There's also no direct bus service between DS and the parks, nor between the water parks and resorts or most parks. Uber/Lyft pick up near the entrances to both water parks, and behind HOB and the Christmas store at DS.