We have tried several events on Halloween, personal and other, and none have gone well at all. I for one will not be able to attend a Halloween event. My suggestion would be to do an early October run or Early November run. you get to close to the Holidays and you get into trouble with people saving money for the big days.
There is a good group of SE Texas Drivers from various clubs and such that have expressed an interest in going this year. On the far end of Texas, it is 6.5 hour trip for us.