Help! Land lease for truck parking

[Santos Gloria]

I was recently contacted by a small moving company who wants space to park their trucks. I'm not sure where to start and I havent been able to find much information online. The vacant land im leasing is 1/2 acre, no restrictions. I have a couple questions, should I rent it out by the truck or just lease them the whole 1/2 acre? Would there be a difference on the insurance, on my part? The owner of the moving company also said he would pitch in to pour gravel down as long a I gave him a year lease. Thank you in advance.