Some thoughts: If you want to ride Guardians at Epcot, and IF you can only ride with a Boarding Group (we'll see), then you would need to have a park reservation at Epcot for one of the days. I would think the APR's for Epcot could fill for that weekend? I don't think I'd want to be anywhere near Epcot on Oct 1, but you may feel differently. Hopping to AK gives you less time there since it typically closes earlier. Is 2pm-7pm enough time for you to accomplish all you want at AK? I have had good success hopping to HS with
Genie+, but who knows what the status of that will be in Oct.
I guess it would help to tell what we would like to do. We have no desire to ride Guardians at Epcot. Here are our musts:
Epcot: Remy, strolling around WS and eating at the food kiosks, maybe Soarin'
AK: FoP, Safari, eating at Yak and Yeti (5 hours would be more than enough! Plus we have the Landry's card so we could plan to do Y&Y close to closing to extend our time, if needed.)
DHS: RotR, MMRR, TSM, SDD
MK: HM, PoC, 7DMT, BTMRR, Splash, JC
I'm worried about hopping to DHS because there are fewer rides we want that utilize G+. Aren't most ILLs?
Honestly I hate to be a Debbie Downer, but I don't think Sunday Oct 2 will be a "pleasant" experience at Epcot.

I could be wrong. I guess if you are hopping to AK at 2, then you won't be in Epcot for too long. We were there on Sat Feb 5th (temps in the 50's-60's) and it was very crowded at all the food booths right at 11am. Also, I think you need to allow at least an hour to walk to the front of Epcot and get over to AK.
I would actually prefer to do Epcot in the morning. We've always had luck hitting the food kiosks right at 11:00. I'm wondering if the fact that it will be the day after its birthday will help with the crowds.
Not really, because the OP could exit Epcot at the International Gateway off World Showcase and then hop a bus to AK from Beach Club.
Beach Club is really close to the IG, about a 5-minute walk (for those reading this who aren't familiar with World Showcase).
Yes, we would do exactly that, especially since almost all of what we want to do is in WS.