Uhh... ok... that's a Problem... I dont want to be limited to stations... I don't know if the smuggling missions check the pad size of the destination.
Has anyone done smuggling with higher ship classes? The missions I saw, where max around 200.000 credits worth and never exceeded 16 tons of cargo. (My Cobra has 32tons)
Aaaaand sometimes I am coming in a bit hot with more than 300m/s and not a perfect angle to avoid the scans. With larger ships, there would be much less room for maneuvers in the station entrance.
Will the payouts scale a bit later with higher missions?
Here's some screen-grabs for smuggling missions, I've about 30 cargo spaces free in my Asp at this point so I could have taken both but they're blocked by other factors, add another big mission like those and you'd be close to a mil!
TBH I'd suggest you try the Diamondback scout for missions like these as it runs so cool (around 22% or less with lower rated equipment), it's possible to fly out of the station and well clear on silent running with any heat-sinks although it'd only carry 20 T

