I would not even bother!

This answer is late, but may help other visitors. During the Covid restrictions ,with reduced numbers of visitors allowed on site, it is preferred that ALL visitors book on the harewood booking system. Anyone requiring an "essential carer" to assist them, can attend at the entrance gate with their pre booked tickets for everyone EXCEPT the "essential carer". You should state that you need a free carer ticket at the gate, and this will be processed with no charge. There is no "senior" rate at Harewood, current adult & child prices on website.

Phone Harewood, or where you brought the tickets from.

Suggest you contact Harewood House. I only visited the place and don’t own it! ☹️

You could probably do it if you stay focused and set priorities. There is a lot to see. We arrived close to opening time and did the bird gardens and some close walks before the house even opened. We then made the house a priority before heading off for more distant parts. We didn't stop for lunch but did stop briefly - once for a drink and once for an ice-ream - but the "cafes" look appetising. We are around your age but good walkers - if you are the same, you will get a lot out of it. There are a lot of seats in which you can take a break - most in scenic positions. It is well worth a visit.

Not NAtional Trust

Yes

Hi, yes both cafes allow well behaved dogs on leads in the outdoor areas of the seating area. However, please note, the Courtyard cafe has a second outside seating area next to the penguins ...and as this lies within the Bird Garden...no dogs at all ( not even " working assistance dogs" ) are permitted, to avoid scaring the wildlife.

Only guide dogs