AOPA members can park for free (with no time limits) at all Avinor airports in Norway (it must be non-commercial and MTOW less than 2730 kg). But this is no thanks to AOPA. It’s NLF, part of FAI and Avinor themselves who got this sorted out when Avinor suddenly started with parking fees some 2-3 years ago.
Thanks Bosco. Makes me want to take a trip there just to support Bulgarian AOPA and GA.