I would assume the easiest of those would be in Great Britain, but I’m speculating. Maybe just to bring a handful of 10g tins and see how many they take away…I’d have to plan ahead and hit a tobacconist shortly after arrival I 'spose…
I would think that any officials at an airport with international flights would have likely encountered someone carrying snuff tins before they spent more than a few months on the job. I’m sure they’ve found much stranger things in passenger baggage and pockets.
I’ve only traveled by air once since I started snuffing, and had not a single question from any of the TSA staff. I had quite a few snuff tins, too, as I visited a tobacconist and stocked up during the trip.
I must say, it’s a tremendous relief not to have to suffer nicotine withdrawal in airports/airplanes anymore!
@Mr O I looked for an answer and spoke to an ex HMRC colleague. Tobacco import is restricted because of duty due to paid on the product when bought in from non Eu Countries.Eu internal imports are subject to a personal use allowance, this is a subjective quantity.So from a legal standpoint as there is no Tobacco Duty on Snuff in the UK this should be a free limit import, however you may be subject to a VAT tax on any quantities you bring in.To be fair he suggested unless the quantities exceed 1 Kg 2lbs and this is subdivided into tins and baggies you should have no problem.This is stop wholesale import quantities being brought in and avoiding VAT.Having said all this You can get all your Snuff posted from several reputable on line sellers ( Mr Snuff) for a reasonable postage charge to the UK.( we don’t pay import duty on orders just VAT)
I can not get an answer in regard to the Duty position on imports Ex Us to other Eu and non Eu countries.
Hope this helps 
Wingcamnut- thank’s! That’s some good info to work with! In any case my travels (if they happen) would be more than a few months out, so I’ve got time to think this through…