I assume you mean 11/7, since 10/7 is already passed.
There are three resorts on the monorail; Contemporary, Poly (where Ohana is), and GF.
If you have dining reservations, you will be allowed to park in the resort parking lot for three hours.
Disney is very good with all kinds of allergies. I also have severe seafood allergies. In addition, my mom was put on a gluten-free diet about three months before we went and she was shocked how accomodating they are. Each time, I made my dining reservations, I made sure I told them up front about my mom's need to have a gluten-free meal.
That being said, if indeed you are going next month, you need to realize that a lot of promotions have been extended and many people have already made dining reservations that are staying on-site 90 days out - you may see things significantly booked - you should make a decision soon or you may be at the mercy of what is left.