Wow, your grandpa must be really nice to treat everyone to a cruise! I've never been on one, but I'd like to someday. =)
and yes, I had lots of fun on the rollercoaster! Although I was scared and had my eyes closed most of the time. I wish I opened my eyes, but I'll know for next time!
So doing anything for Halloween? I'm not, but I've been to 2 haunted things already. One of them is more fun than scary to me, but near the end some guy will chase you with a chainsaw. XD the other one was at a church.. and it was really extreme. I was more scared at the church one.. everything looked so real and gorey, and they played loud death metal the whole time to scare me even more ><