Preparation is everything
It is definitely recommended to rent a car for the time in Yosemite National Park. The National Park is at an altitude of over 3000 feet and the way to your destination is long. Depending on the traffic you should plan extra time. The journey time alone is about 1 hour from Groveland. Alternatively, it is still possible to get to the national park with the shuttle bus that is provided by Yosemite.
In addition, it is advisable to take sufficient food and hiking boots with you on a day trip.
A GPS navigation device is an advantage when travelling. At this altitude, the Internet is scarce. If so, then in the local “restaurants”.
When you arrive at the Yosemite National Park and pay for your tickets, you will also receive a map with which you can easily find your way around.
To travel is to take a journey into yourself
– Danny Kaye