I agree with Mike.
Great service, easy to deal with.
Just follow their shipping instructions exactly and make sure you return everything they sent. I forgot to return the soft case once but they were great to work with and didn't charge me for the late return of the case.
CameraLensRentals.com - Pentax Wide Angle Lens Rentals
I'll use them to rent a speciality lens for travel and just to try out a lens before I buy it.
Do make sure you get the Damage Waiver. It's cheap and covers you in case of damage to the lens.
Enjoy your trip.
Rusty