|How do companions effect sneaking?
I'd say, rather somewhat, VERY [censored] BADLY!
AI svcks at the best of times, expecting a companion to understand your needs for stealthyness, sneakiness, and generally not acting like a [censored]? Near Impossible!
I tried to sneak through deathclaw quarry one time, stuck to the cliffs, crouching, sneaking, stealth boys, silenced pistol and the rest.. but made the mistake of taking that dratted machine Ed-E..
I see a bunch of Deathclaws in the distance, and wisely avoid them. What doese Ed-E Do? "do do do DOOO dooo!!" and storms out with it's tiny pea shooters blazing. Deathclaws smack down Ed-E very quickly. Realise somethings up, notice me. dead.
So no, best not to take companions if you want stealth. Imagine you're trying to sneak past something big and scary, and just imagine boone stomping straight through, and pulling out his knife in his generic glitchy buggy way, starting on every single thing you've been trying so hard to avoid, and dying quite quickly..