Thanks folks! I've been a long time lurker here, and I can't believe the amount of quality info that comes from this site. It is a great place!
I was concerned about the liability issue also at first. However, here in Nebraska, we have a law that states that as long as the landowner is not receiving compensation for access, he/she is not liable for mishaps that occur unless he or she knowingly fails to make users aware of unusual hazards. People who are granted free access assume risk in exchange for access to the property. Now, if the land owner charges a fee or receives gifts in compensation, then he/she becomes liable for incidents that occur.
I asked about whether or not the card would open me up to legal issues and was told that it does not. It just confirms that the bearer has my permission to access the property for the period denoted on the card.
Sounds very similiar to the law in here in IL. It is amazing how many people don't know about this and the answer you will get when you telling them about it.
