i do both parks on the same visit.
i had to make my adr's for the motherland back in march.
then 2 of the places i had adr's for changed and just got called by disney a week ago to be informed.
like i sit here and say to myself, what do i want to eat on oct 3 for lunch...where will i be....
ressies for uo are easier to make.
if you want emeril or tchoup tchoup, make them a week out but you can still get in on the day of your visit in some cases.
you can call mythos for a ressie 7 days out but really, you can get in the same day.
be aware that mythos closes at 3 pm each day.
there are some exceptions of them staying open to 7 pm during high season time for some dates.
if you are concerned and stressed out on making sure you can go to mythos, call and make a ressie.
they do not accept them more than 7 days out though.