Those fattys look a little thin? Yeah a probe helps for sure. I cook mine to 165 internal. Doesn't really matter if you cook with HH (like 300-325) or low and slow (225ish). I prefer HH cause it gets done faster and crisps the bacon nice!
--Modified ECB---Mini WSM---22.5" Weber blue OTG---'69 18.5" Weber redhead----Mav ET-732