Camera and Lens Rentals in St. Louis, MO
For the past few years, when shooting large events in indoor spaces (such as the 2010 Priesthood Ordination Mass), I've rented camera bodies and lenses from BorrowLenses.com, a great online rental store, with pretty much any lens or camera body you'd ever want to use (especially if you're like me and could never justify the cost of purchase!). I highly recommend BorrowLenses (though I have also used and liked LensRentals.com and RentGlass.com).
This year, however, I decided to look into whether it might be more advantageous to use a local camera shop. I found that both Schiller's and Creve Coeur Camera offer camera and lens rentals, but both have more limited selections. However, the lens and camera body I need are usually available at Schiller's, I don't have to pay shipping (pick-up only, but the store is nearby), and I can pay a one-day rental rate for a weekend (most of the events I use the cameras for are on Saturdays).