2015 RT 5.7 M6
Only rivets I replaced are at the wheel wells. Then again, mine is a 2015 so no experience on the pre-2015 clips. Hardest part is getting to the 2 screws that are essentially inside the front clip but a deep well 10mm socket and stubby 1/4" drive make it easier if you tackle it from the bottom of the car. No need for 2 people BUT there are 2 plastic pins at the top the you need to be careful not to crack. Maybe I am biased because I have removed it so many times but really makes things a whole lot easier.I'm hesitant to remove the front clip (by myself) since you have a large painted part that could get scuffed. its a job I'd want a helper with to avoid any issues.
so far on the things I've done, haven't removed any front fascias yet
plus there's the rivets that hold the top of the fascia @ the hood seal that you have to replace when you do that operation.
As a matter of fact this weekend I plan to remove my rear clip to finally install the LED reflectors which I think is harder to do than the front clip.