Can they scan the ticket from my phone?

Write your resv# down both on your phone and on a handy pocket notepad for quick reference in case of poor wifi.

Yes, but the cell reception can be weak there so better to save it in your mobile in case you can't access emails

Yep

Yes

They just looked at my E mail at the entrance gate before the parking and We were admitted.

Yes they can

It said on my email that my email was not my ticket so I went ahead and printed them out

I showed them my email like 2 weeks ago and they accepted it.

I think so but I took the shuttle so the guy just checked my ticket from my phone. So I think so

I don't think so I read the instructions on the ticket and it said that they must be printed. It wouldn't hurt to call and ask.