I would not save any of my location on google maps. I understand it's frustrating but google is tracking you everywhere you go. I pinpot a school close to my house or a friend house and save that locations. If your email get hack they can go online and look at your last locations through your gmaps.
I personally use maps.me. It is available for both Android and iOS devices. It saves the entire map of the country of your choice so you can use it offline. I prefer this because it only needs your GPS to be enabled and does not consume mobile data.
I do not use Google Maps because I think it requires mobile data to track where I am and navigate me to my destination.
Give it a try if you have time. It might be what you're looking for.