It sounds like you have it right. If your smoker generated any positive pressure in the MM can, it’s job is to blow that off that pressure before it can damage your crank seal (or others) so that’s why you’re seeing the smoke. Big hose goes directly to the valve cover and small hose to vacuum. 
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)
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