Have them on a RAV4...also had very similar tread design with a set of Antares tires. Excellent in the rain and wet cold roads. Next best thing to a winter tire.
I still have the Hankooks on my 21' FX4 with Fox 2.0 as well. Also have a set of Hakkapelitta's for winter. I can average about 22 - 25 mpg in the summer. Around 21-23 in the winter.
Do you get decent mileage when you aren't towing?
Is that Lake Ontario, Erie or Huron Behind you? Great supercab....they are a rarity...still trying to figure out ifthey are coming back to Canada on the 6g...