I say go, it's not so remote you can't order a cab, you would still have to get to a carpark to drive away so same in principle as hiring a taxi. Surely your mom's partner could put his differences aside in the very slim chance of an emergency?
@Anita my mums partner isn’t the issue he would do it but my dad would make things miserable for my little sister if anyone even mentions his name (he’s petty like that)
I understand "collateral damage". But you should go and enjoy the experience with your little one, I googled the park it looks amazing. Good exercise for mom and baby too.
So is the option you drive or you ride with your mom and her bf and your dad drives himself?
Just want to add for the first option I would be keeping taxi fare just incase