Partition part of land for landlord only use that a rental house is on.

[William K.]

I have a rental property that has a main house and an ADU on it. The main house is ready for rent, while I'm still working on getting the ADU ready. Right now I have the land partitioned into 3 section. One is for the main house, one is for the ADU, and the last is for me to store my boat.
My question is how can I access my ADU and Boat without having to contact the tenant.  Also, is there some prevision I can put in the lease to prevent the tenant from blocking the drive access to the ADU/Boat and from physically messing with my stuff, such as a fee.