Sheldon, If you look at the date sheet page 229 you will see that the default pin selection's for USART2 input is on port B.7. I have never in the past 2 or so years had any problem with LOCKOUT of the ICSP. I always use the 2 USART hardware serial ports for my projects. I only have to set the Output PPS port pins for the 2 hardware USART's. I use RC6PPS = 09 and RB6PPS = 0B. I always use a BootLoader as well.