From Vimmerby:

Drive south toward Tuna.
Continue through the Tuna village.
After about 1 km you’ll pass Tuna's Church.
Shortly after the church, follow the signs to Virum Moose Park.

From Västervik:

Take the E22 south for approximately 23 km.
Exit the E22 right direction Hjorted.
From Hjorted, follow the signs to Virum Moose Park.

From Kalmar:

Take the E22 north, until about 23 km south of Västervik.
Exit the E22 left direction Hjorted.
From Hjorted, follow the signs to Virum Moose Park.