I was told I have to upgrade my membership so I can add two more people on my account. How do I do this ?

I think you'll have to go to the website and go to memberships or something similar

Online. Easy to do.

Either go online or call them

You can do it online or you may be able to do it at member services at the park. However, if you decide to call them, I will tell you that it's virtually impossible to get a hold of anyone... you're on hold FOREVER and still won't talk to a member services representative.

Do it online

Thanks all !