Hello Jim
Long time ..
Regarding transport ops in Norway during Unternemen Weserübung in 1940 and later I must point you in the direction of one of the two leading Luftwaffe experts in Norway to day, namely Bjørn Hafsten. His knowledge also include seaplane operations along the coast.
I belive he will take contact.
Greetings from Norway
Knut
www.rafandluftwaffe.info