The Hampton Inn & Suites St. Pete-Downtown is located in the waterfront district of downtown St. Petersburg, Florida.  It's a 3-diamond Hilton brand hotel and it's the closest major hotel to the wedding ceremony & reception site (right across the street to be exact).  This hotel is in walking distance to Publix supermarket, CVS pharmacy, BayWalk (retail, restaurants, 20-screen Muvico Theatre), and the St. Pete Pier.

The Hilton St. Petersburg Bayfront Hotel is also located in the waterfront district of downtown St. Petersburg, Florida.  Although it's just a few blocks away, this 3-diamond Hilton brand hotel is one of the closest major hotels to the wedding ceremony & reception site.  This hotel is in walking distance to Publix supermarket, CVS pharmacy, and BayWalk (retail, restaurants, 20-screen Muvico Theatre).

If the Hampton or Hilton hotels are booked up, the next closest major hotel is the Courtyard by Marriott St. Petersburg Downtown‎.  It's about 6 or 7 blocks away from the wedding ceremony & reception site.  It's also a 3-star hotel so it should be reasonably priced too.  This hotel is in walking distance to BayWalk (retail, restaurants, 20-screen Muvico Theatre).