If you hide your car from being repossessed what will or could happen to you for doing this?

In some states you could be charged with hindering and arrested. In others the lender could seek a replevin against you at which time you would either give up the vehicle or face criminal charges. Other lenders will simply take you to court and seek a judgment against you, at which time you will have no choice in how the debt is recovered or when. It will be taken from your pay check, your bank accounts, your tax returns, it could aid in the forced liquidation of other property.

Your two easiest options are pay the note or turn in the vehicle. As long as active repossession is in place, you will lose the vehicle; it's just a matter of time.