No, no one has ever stayed there.

Sorry, I couldn't resist.
You do NOT have to book the cruise package at the Radisson to get the free parking. When we stayed, the difference was that the cruise package included breakfast for 2, the normal stay did not. You can make a shuttle reservation up to a year ahead by calling the front desk at the hotel. Shuttle starts at 10. Older hotel, nice pool.
Other options--Country Inn and Suites. This is the ONLY 2.5* hotel on Priceline in Cape Canaveral (do not expand to Cocoa Beach!). Typical cost is a $49 bid for a total of just over $60. Includes free breakfast for all guests in the room. The parking is free with a full price reservation; they sometimes charge $20 to leave a car on a Priceline reservation.
Residence Inn--newer than Radisson. I haven't stayed there personally, but it gets good reviews on the boards.