In some places it can be illegal for your or anyone else to live on parents property in a camper or rv.
Some towns have restrictions about parking rv's and campers in properties that aren't rv parks and can get you fined for parking the rv or camper on your parents property.
Check with your town or cities laws as some might allow you to park your camper or rv on your parents property and others will throw fit if you do and drag you to court which is a shame.