I am wanting to book the hotel only as I already have tickets but the rooms for my date say for 5 guest while I have 6 family members, can I still book?

Only 1-2 show up at check-in desk, then once you have the keys, you can accommodate yourself how ever you want, maybe request an extra bed or sofa bed

Yes there were 7 of us when I went

You probably can still book. If they say you can have 5, put some people sharing a bed

I would actually call the hotel to see if they can accommodate your request!

Yes you can although I'd double check. It's fantastic.