Average time, from gate to resort checkin, is running about 70 mins. If you land, ontime, at 10:30, you 'should' be at the CR by noon, at the latest. But, if the planes arrives late, all bets are off.
As far as making ADRs for that day, you could make an ADR for a late lunch...after 2, or an early dinner one. And I would make it for someplace in the immediate vicinity ......Chef Mickey's, 'Ohana, GF...that sort of thing. That way you don't have to worry about getting to a distant restaurant.