Kid Rock -- Van-Crashing Trespasser Doing Hard Time in Prison

Kid Rock and his fam can sleep soundly ... the man accused of attempting to drive his van through the front gate of the singer's home has been sentenced to several years in prison.

42-year-old Brian Duane Keith got nailed on three counts -- attempted home invasion in the 2nd degree, malicious destruction of property, and malicious destruction of a building.

Keith -- who was captured on surveillance video of the July incident -- smashed several windows after breaking Kid Rock's gate.

Keith was immediately taken to prison to begin serving a sentence of at least 46 months.