I'm a 49 year old avid roadie toying with the idea of building up a touring bike to do some light-medium road touring. I am 6'-3" and weigh 190#, live in Utah (mountains), ride ~7k miles per year and would be considered a fairly strong recreational rider. I want to go with 10x2 drivetrain gearing with an 12x36 cassette, and I anticipate mostly weekend tours with an occasional 7-14 day biggie trip. I'll primarily be riding on pavement, but with potential for some gravel road / light offroad (ya never know if you decide to wander and explore).

What size chainrings would you suggest?