It's defintely worth to go there. I been there in last Summer and we pick the the blueberry and it's really delicious. CNY we will go there with my girl and it have Strawberry pick up
too.
You need 1 full day in Mother Farm due to the long transportation time.
You can check their web site for the transportation wayhttp://www.motherfarm.co.jp/access/public_way.html#tokyo
If you going to take the free shuttle bus to & return 君津駅 to Mother Farm. You can ask your hotel to make the
reservation for you.