Temps at Gold Point are generally mild in Oct, maybe a light jacket at night. Being the desert, that can vary
Can be a bit colder at higher temps (the snow pictures were at the top of White Mtn.
I was on one of the three GS's in the pic, no issues on any of the rides.
There will possibly be gas in town at the event, check with Herb when you make your reservation.
This is a fun event with a great group. Herb goes out of his way for this. He only asks that you respect his property (it's his town). It'd be great if the entertainment shows up again (you'll have to ask jrazor about that)