On a short trip last week in the Keys, I blew past a couple at maybe 12 mph in a 25-30 mph headwind. They were going half that speed. An hour later they pulled into the campsite next to mine at Bahia Honda SP. The guy was smart, in that he had his wife pulling a kid carrier for two crammed full of gear. He was riding with just two small panniers. Got to chatting with them later, and the guy pulled out a hatchet (not in a threatening manner, of course). What do those things weigh? I'd guess a good 5 pounds. WTH are you going to use a hatchet for in the Keys? Chopping up iguanas? They had a huge tent, camping stove and who knows what else?
That is the epitome of UH touring.