With the tight patters of today's chokes and shells I would definitely recommend a scope or red dot... I like a scope...
I can see it now... I'm working a gobbler and I have my red dot sight on and 15 min goes by and gobbler pops up out there 30 yards and I put my gun up and my battery dies... Or I'm sitting there with my red dot off and a gobbler comes in silent and I'm busted tryin to turn on my red dot... I'll pass I like a scope