@Sjm9911 - I'm going to try to tackle a couple of the questions you have noted above...
First - schedules. This far out, your best bet is to look at some of the online resources that have project park times. These will give you a 'peak' at what might be, but they are far from certain. For the most part, before the 6m window, WDW will release schedules for the time period you will be there. That said, it is important to note that those forecasted schedules can, and will, change. As crowd levels become more clear, Disney will flex closing hours especially. EMH and opening are less likely to change, but parks might stay open a bit later if crowds are going to be higher and/or close early for a special event that is planned at a later date. Especially with the lack of certainty with SWGE, the fall calendar is very fluid right now. If it is open when you go (my personal guess is that it will NOT be), expect parks to be open later and crowds to spike. If it is not yet open, the current projections will be closer to the end result. So, use it as a guide, but know that it will flex.
As for park visits, a lot of that, for us, revolves around FP+. There are certain restrictions regarding tiers in some parks, and that can play a role in how many times you want to visit a park. One thing that would be work consideration, in my mind, would be getting more days. If you are already buying 6-7 days, it is not a huge cost to go to 9 or 10. Every day for which you have tickets is another day you can get FP+ for 3 rides. We find that half days in the parks (or split days) using FP+ is better than trying to go all day. Because it allows for more FP+ reservations, I'd rather go for part of 8-10 days than all of 5-6. With a family of 3, you might be talking about $100-$125 to make that jump. For us, it would be more than worth it. Take a look at the rides with FP+, determine which ones you'd want to do, and see how that fits in your schedule.
Finally, regarding the Fort at Halloween, make sure you note some of the historic schedules for Halloween events (others can probably point you to them more readily than me). There are often events on 10/30 as well as 10/31 - some of which you really don't want to miss (can anyone say cart parade!!). I would plan mornings in parks for both of those days, but plan to be back be early afternoon for the Halloween events - but again, that goes back to having more entry days to use.
Each person's desires and priorities are different (ie - we ALWAYS have hoppers, many others never do), but this initial feedback will serve as some food for thought.
Have fun dreaming!!
We might try to get a last minute ADR for Jungle Skipper Canteen though. 
