I hope you learned, do not ask them anything besides "where can I find *item*?"
I use the royal garden cypress blend. its what lowes/home depot sells here. I called at they basically said it contains pine but is mostly cypress. I will say when they stock it I like the pure cypress better since it is normally shredded better. however its been a while since I've seen it.
People freak out over pine, but I don't see any reason to. Sure you can find a few real studies that show respitory problem when breathing in pine dust. Obviously this is a problem in woodworking and mills and things like that. It could even be an issue in rodents which create a lot of dust by chewing it into dust. however snakes just crawling on it? yeah im not seeing the issue. I've always heard of oils being toxic but find no real backing to this claim and given the numerous amounts of people who keep snakes on pure pine, I wouldn't worry about it personally until something other than hear-say says otherwise.
cedar on the other hand I haven't seen or even looked for studies on it's effects on snakes, but from working with it, I know it can get to me quickly and it does produce an obvious oil. Knowing this with a few horror stories of snakes passing quickly or having problems while on it basically made me never even consider it. it is naturally weather resistant which is great for out door furniture, but chances are not so great for snakes.