Rock Chuck: I have NEVER heard of a charge being brought or of a prosecution for "spreading loved ones ashes" on public or private lands!
And "I" been around.
Even the demonrat cretins who spread the ashes of the animalistic mass murderer known as ted bundy, out the window of an airplane over my beloved Cascade Mountains was NOT charged or prosecuted!
SO... no charges - no prosecutions - no worries.
Technically legal or not no prosecution then no punishment or worries.
Do not let the sound of your own wheels drive YOU crazy!
Don't worry, be happy.
Hold into the wind
VarmintGuy