I have some information about the boat to Hollywood Studio.
They are currently running four boats to DHS, starting at 8am for a 9am park opening. (We saw all four at once). One boat sits at Boardwalk, one at Yacht Club and one at Swan/Dolphin. The fourth boat comes in from the Epcot side of the lake and goes to the BW after the first boat leaves, then YC, then S/D, then DHS.
We crossed the bridge between the Yacht Club and S/D at 8:08am and the fourth boat was heading to the Yacht Club. The first three boats unloaded at DHS very quickly. The fourth boat got to the DHS boat dock just about the same time as we got to the temperature check point, around 8:26am.