Has anyone ever used Wilton's plastic plate pegs with the cake plates? The instructions say that the pegs snap on to the bottom of the cake seperator plate to help keep it in place. However, I cannot figure out how these "snap on". Was wondering if anyone had any advice. Do I really need to use these? I am planning on doing a two layer stacked cake 9" and 6". What kind of support/construction should I use? Can I set the top layer directly on the bottom layer? Should I use the cake seperator plate or just a cake board?
TIA
They do snap on to plates that are made for them. There are holes for them in the bottom of the plates. Not all plates have these holes. I've never used them though because I've been told that they really don't add that much support. Do the kind of plates you're using have "feet" on the bottom that will stick into the next cake? These should be enough to keep the plate in place. If there's nothing on the bottom of the plate, then just be sure to put enough buttercream on the bottom to help keep it in place. 
S.
I hope that I can answer some of your question and perhaps others on CC can help out with some of their suggestions. I would use a plate for bottom cake and use a cake board for the top layer and you want to use dowels to support top to bottom cake so that when cutting the cake, the top layer will not slide off. I would measure the dowel rod to the bottom cake and also the top layer and if dowels are too long, then I would cut off what you don't need. You can mark the holes where you would like your dowels to be, then you make holes in the top cake board and then insert your dowels into top layer of your cake then through the bottom. You can make markings where you want to put your roses or whatever flowers you will be making. I hope this was some help, but others might have different opinions or ideas.
I have never used them but I have read that you definitely should NOT use these pegs for support. They are simply for keeping the plate from shifting off the cake it's sitting on. You still have to dowel properly.
In fact, the following is straight from wilton.com's product page:
Plastic Pegs
Insure that cake layers and separator plates atop cakes stay in place. Pegs do not add support; dowel rod cake properly before using.
Length: 4 in.
http://www.wilton.com/store/site/product.cfm?id=3E311B76-475A-BAC0-5EF476FB742AB190
Thanks for everyone's help. I was aware that they were not for support--however, I guess I bought the wrong kind of plate to use them with. I bought the plate that has the little feet-so I guess I will just use those to help make sure the top layer doesn't slide. i will also be using dowels in the bottom layer. I'm not going to be putting the top layer on until I'm at the destination so I'm not concerned about not being able to dowel the whole thing. Thanks again!!
NO, I'm pretty sure you got the right plates. You're just used to seeing the little feet on the underside of the plate. I think - if you have the plates I think you do that on the topside of those plates are little round almost-holes where those pegs fit into, so you flip the plate over so the little feet are now on the topside, and the pegs point downwards. I'm pretty sure most of the separator plates are like that..... 
Those little peg things are weird, I didn't understand how to use 'em either! =)
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