Anyone have a lease that includes periodic use of property by landlord ?

[Will Sherman]

I have found a tenant that has agreed to a relatively unconventional agreement for my furnished property in a popular vacation location. I would like to be able to occupy the property for 1 week every 4-6 months, which they agree to (with enough notice on dates) as they have to travel for work at times and could easily vacate during these periods.

Has anyone written this sort of agreement into a lease?

My initial thought is to write it as an addendum with specifics of how many weeks a year, max duration, rent will be prorated that month, dates must be agreed upon with tenant at least 3 months in advance, etc

Thoughts?