I think that would have to be a perfect situation where they are happy to move out for June-August. When my previous tenants didn't want to move out, I offered that they could leave their stuff there if they wanted to travel for those months, but that didn't work for them.

But I did wonder if I could find a subletter rather than a tenant? (I guess I'd need to give myself, or my friend, a lease?) What are the rules on subletting with the Renters Rights bill? (What if a subletter doesn't want to leave?)