How do you evaluate a piece of land?

[Jessica Howard]

I came across a parcel of campground land that I'd like to purchase.  It's 50x80 feet.  It has access to electricity, fresh water, has a road that leads up to it and has a lake view and has been used for camping.  The problem is that I don't know how to evaluate the value so I can make an offer.  Can someone offer me guidance on how to evaluate this deal?   Thanks.