Personally, I would remove as many reptiles as I could possibly then make the ones that had to stay as inconspicuous as I could. I would say something to the landlord or visiting person warning them that there are snakes in the appartment. The last thing I would want is a freak out situation that would almost garantee the animals having to be out of the appartment.
What is the inspection for? If for repairs or due to a specific problem I can understand, if it just for checking out the appartments I would be wary if your landlord does this more than one or twice a year as it can be invasion of privacy.
Keeper of 5 snakes, leopard geckos, 1 green iguana, 20+ tarantulas, 2 dogs & a bunch of rats!