Steve, when you start your research into a Tire Monitoring system take into account that some models have the sensor that merely screws onto the valve stem.
However these type require a METAL valve stem so dismounting the tire is required to install the new stem, it is not likely that your tires have a metal stem. Note, that to extend the life of the sender one removes the sender upon storing the TT, this is fast and easy and makes ROTATION of the tires very easy.
Another type has the sender mounted INSIDE the tire also necessitating dismounting of the tire. Note, I do not know how these are treated when one ROTATES the tires.