"...and there's a rifle or shotgun..." That'd be if there's more than one firearm and 2 people in the blind both are assumed to be hunting. Mind you, Ontario's definition of 'hunting' covers just being there. A little CYA goes a long way.
"...RPAL is really just about the extra usage laws and..." Handling test and possession laws as well.
The whole thing is mostly about how much money you want to spend. Costs less to do the PAL(that you have to have to get the RPAL) and RPAL at the same time. Hunter's safety is mostly about the game laws and shooting safety in the field.