I have the same question but haven't seen an answer. Everything I've seen about the Single Pass has said it's the same as the ILL, except they can be booked ahead of time, so I'm hoping we'll be able to do what you described, but haven't seen it addressed. We like to hop from HS to Epcot, so I'm hoping to be able to get the Multipass for HS and a Single Pass for GOTG.
Yep, about to post exactly this. I spoke to a CM on the phone last week who "confirmed" only the LLMPs have to be pre-booked in one park, meaning you can book a LLSP/VQ for a different park (if you have park hopper) for later that same day, or first thing if you're booking the LLMPs in the afternoon.Yes you be able to use your LLMP at HS and with a Park-Hopper entitlement or AP go to Epcot and get a LLSP for GoTG.
Dave
Hope that makes sense.