My Goodness! that is a huge cosplay. I do know that the weapons and props section says something about props in the policies section.let me check...Ah I found it...
Staves, bo sticks, boken, shinai, and wooden swords will be permitted as long as they are handled responsibly and meet all other criteria. For information on wooden paddles see above in the items which are not permitted.
Fake, prop, or made-up weapons (i.e. made of tissue paper, plaster of Paris, cloth) are permitted if they are safe and not dangerous to others around you. (Dangerous conditions include, but are not limited to, wires sticking out, items that trip others, clothes lining someone, etc.)
Prop weapons shall be limited to less than six feet six inches (6'6") in height and less than fifty pounds (50lbs) in weight.
Any metal chains are to be less than three feet (3'). This includes, but is not limited to chain wallets or any non-costume chains as well.
Behavior with Weapons
Misuse of any weapon or prop, such as swinging it in a public area or causing hazards to others, will result in the weapon or prop being deemed unsafe for the convention.
If a weapon or prop is deemed unsafe for the con, we will ask you to remove the weapon or prop from the convention and store it in your private quarters (your home, hotel room, or car).
Any weapon purchased in the Dealer's Room must be boxed and removed from convention property immediately, and should remain boxed and stored in your private quarters. Weapons are not to be taken out of their packaging or wrappings while on BCC property.
All props and weapons brought into the convention may be inspected and approved or rejected by Otakon staff, including those that may have prior approval (other conventions, previous conventions, or pre-convention approval by Otakon staff).
Any item that poses a potential safety hazard is subject to challenge and may need to be removed from the convention. For example, any costume, prop, or accessory which is too wide or bulky to maneuver the halls safely may be disallowed.
In the event your weapon/prop is approved by one staffer, and is contested by another, the head of Spec Ops will make a final ruling. Please note that just because a staffer has not stopped you to check your item, does not mean that the item is allowed.
i know its in the weapons section but read it over and it should give you some info saying its very unlikely that you can do that cause stilts will probably be considered too tall or too bulky or something that could potentially hurt someone if you stepped on their foot...etc. but there you have it. i hope that answers your questions