We ride our 250's at 1.1 - 1.2 on gravel, never had a problem or puncture, and here is some very rocky tracks in our area.
Short distance on tar, 10km or less, we just ride slower, but once on the open tar road we ire-nflate them to 1.5 - 1.8.
Interesting to see the lower foot pegs, I was...