Translation of "blithe" into Danish

When I was a lad, a journey down the rivers of England was a truly blithe experience.

var turen ned ad Englands floder en munter oplevelse.

You say things to someone like me, who's older and smarter, with this blithe air.

I siger ting til en som mig, der er ældre og klogere, så ubekymret.