I wasn't in good enough shape this year to tackle the H'n'HH, but I didn't realize until afterward there were options for shorter distances. Maybe next year I can tag along with some friends who plan to ride.
Overall Texas has become much more cycling friendly since the 1980s when I moved back here. The H'n'HH probably contributed to that awareness and share-the-roadness. As a solo rider around the city streets and rural roads I've had mostly positive experiences, only a tiny handful of folks who were a bit rude or inattentive.