An unusual request from my tenant

[Dustin Cornell]

A tenant of mine has an out-of-town “friend” that regularly visits him. Earlier this week, they (tenant and friend) told me that her parents would be in the area for a few days. They then asked if it would be ok for them to park their camper on the property while they visit. I told them I needed a few days to think about it. I really could care less. However, before saying yes, I wanted to seek advice from the BiggerPockets community.

Are there any legal issues you could see arising from this?