If you are the event manager for a craft fair you will need to promote it. Part of your promotional armory are banners and posters. You will also need to make sure people can find the fair by erecting temporary directional signs.
We learned very quickly that you need to be clever with your wording, especially if you want to keep your costs down and reuse materials (It makes sense both from a financial, environmental and time point of view). For example, if you are putting a banner up that has a date it will only last for that one event. If you put up an onsite banner saying 'this coming Saturday' you could reuse it.
Staying within the law
Sign posting is not something you should just do. You need to speak your local authority and the police as there are complex legal rules to abide by.
If you put up signs without permission that do not meet the authorities guideline you may find yourself getting a hefty bill for the taking down of the signs and perhaps a court appearance.
Talk to the local authority (probable the planning office asking for the person that deals with temporary signs) that controls the area where the event will take place, on the telephone. Do this early on as it can take a while. Make sure you have your proposal in place, so that the process can go smoothly. You will need to know at a minimum, a brief description of your event, the number of people you hope will be attending, the number of and type of attractions, the exact location of the even and the proposed dates. After the first telephone call, it is best to arrange a face to face meeting. During the meeting you will need to have all the details discussed but in more detail, your event objective, outline and or proof of your public liability insurance and the expected size, type and mode of transport for visitors.
Temporary directional signs
Is your sign a directional sign or is it actually an advertisement?
Anyone putting up a directional sign hopes that this will encourage some passing trade on the day but this is not the purpose of the signs. You need to be advertising locally, regionally and or nationally with location details included in your advertising. The directional signs are put up to safely direct people, who are unfamiliar with the area to the local, to the craft fair.
Here is a link to the temporary signs page of Surrey County Council. This gives you an example of the type of rules to abide by and the timing required to apply (at least one month before).