According to a friend in the area who is on property quite frequently, they are really cracking down as crowds increase, and without an ADR odds are high you will not be allowed past the gate in your private vehicle. EVEN with a mobile order and EVEN if you have clicked “I’m here! prepare my order!” it is pretty much a no-go.
So for Geyser Point, which does not take ADRs, you’ll need to plan on arriving by Disney transportation. If you have your own car that would either mean paying to park in a park lot (assuming you don’t have an AP or something that gives you free parking) and take transportation to and from the park OR park at Disney Springs and take Disney transportation.