I really liked this, great game!
I even managed to find the SM-8 (For those that don't know, if you get the Come Find Us chant from the radio which I think is triggered from going off map the radio will repeat coordinates, IMMEADIATELY WRITE THEM INTO THE MAP!) and download the data!
Only thing I would ask is a way to draw a bigger map so navigation outside of the given map is easier, otherwise you're pretty much just driving blind.
TIP: If you hear something like a monster groaning, immeadiately STOP, and wait for it to go away. chances are: that's Ellie getting close! (wait between 3-5 seconds at minimum.)
Can't wait for future updates, but as I have said already in other comments: TAKE YOUR TIME! Good Products come from time taken!