^^ I was gonna say find a hostel to stay there ... my family and I all went a few years back ... I was too young at the time to go out on my own or with my bro and his friends so I was stuck with the 'rents ... but my bro actually backpacked all over europe and stayed in nothing but hostels.
I get it lucky... I've got so much family around the Netherlands I can pick and choose where I wanna stay free of charge with free food LOL
As far as the smoke ... you can go anywhere. My dad actually found a nice hash shop in Oss that he frequented regularly while out there ... and stumbled his ass back afterwards
Otherwise hunt around for the coffee shops and head shops. I remember going to one head shop right in Amsterdam, and I walked out baked outta my skull they had the shop so damn hot-boxed.
Don't bother with the Cannabis Cup ... its more hype than its worth, and yes from what I have heard you cannot keep up with the locals... the grass is not necessarily the best but its all different strains out there ...
The best rules to form a young man are: to talk little, to hear much, to reflect alone upon what has passed in company, to distrust one's own opinions, and value others that deserve it.
Sir William Temple