I have a lady who wants to place an order for a cake but she is traveling 9 hours to the destination. Not sure yet if she is wanting a tiered cake but it needs to feed 60 people and look formal for a 16th birthday party. I have no doubt a sheet cake would be fine for traveling that long but do you think a tiered cake would make it that far???
I wouldn't do tiers for a 9 hr. trip. If there is a problem, you won't be there to fix it.
A 14" round or square will serve 60+ and can be decorated "formally".
Rae
I haven't used it yet, but most here seem to swear by the SPS system if they want tiered. But due to the distance, I would go along with BlakesCakes and do the 14" cake for safety, and I would use dowels.
SPS and it should be fine for that long of a drive. But really, a lot of that also depends on the driver. I've seen people wreck a cake driving 5 minutes away. Seriously, smashed the back up of every last tier and every last satellite cake I made. 
SPS stands for single plate seprator. Leah_s has a sticky all about SPS at the top of the How Do I Forum. Check it out & you will get all the info. you need about SPS.
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