Mac,
From the Garforth Hilton its a 5 minute drive to Temple Newsam, Elizabethan manor house, extensive grounds by Capability Brown, working rare breeds farm national collection of furniture, ( Sheraton, Hepplwhite etc) and a a very photogenic place all around.
Also on the farm are the old woodwork shops with the antique tools and machines.....
Fulfils most of your criteria I think and hardly any time lost travelling.
York IS very attractive, but you need more than a day, and driving /parking is a pain......
And if you are visiting Optare, then grab a meal at the Barnbow Pub, about 300 yard walk away from Optare...heard its nice ( Used to be called the Manston until recently) and take note of the stonework on some of the older houses round there, they have the Templar Cross built into them in stone,, harking back to the days that Temple Newsam was a regional administration centre of the Knights Templar.....
Enjoy your visit !