NOTE: VIP tickets DO NOT INCLUDE a meet and greet and will not have the opportunity to have an item signed. The allotment of VIP tickets is up to 200 and EC won't be able to do 200 meet and greets before the show. Be sure to request a meet and greet through the tour section of the site and you may be able to get one through that channel.
Typically this is allowed but I would recommend checking with the venue to verify they will allow you to bring it in. It is also a good idea to see if they have a lost & found or security office where they will secure your guitar until after the show. It can get pretty rowdy and I'd hate for your guitar to get broken or beer-soaked.