Andy, I would personally keep them inflated as close to max as you can. There is a reason that the mfg. put that on the sidewall. Tom's suggestion for the infrared temp sensor is a pretty good idea as well. Back when i used to tow, I'd just stop and grab the hub by hand. Thankfully, it was always cool so I knew there wasn't any trouble brewing. I'd also bring along two spares. If you purchase from a national retailer, you could always return them once you get to Florida. All I can say is that on our weekly trips to the cottage, I can always count on seeing at least one boat with a flat. Don't let it be you!