How early do the boats run from FW to MK?

I have read conflicting information on whether the boats leave FW for MK for pre-rope drop ADRs or even to make RD? Some reports say 6:45 am, while other reports have said the boats only run 1/2 hour before park opening. Anyone been there recently can tell us how early the boats launch for MK. If the boats are not leaving until 1/2 hour before park opening do they leave any earlier for the CR? Would a better option for a pre-RD ADR at MK be boating to CR then walking to MK? Or will a cab to CR be necessary then walk to MK?

Don’t remember the timing sadly. Buses are also a possibility. Maybe call the FW concierge?