Not in NJ, but....
I was able to find a Sleep Inn in Denver with a decent rate for up to 14 days parking. Before I booked it, I shopped around and found the same hotel, same package, for $10 less. So I booked on the Days Inn site, took a screenshot of the valuefly.com pages for reference, and immediately submitted a claim to Choice Hotels' Best Rate Guarantee. Booked yesterday afternoon; this morning I had a confirmation email that they were able to verify the cheaper rate, and my one-night stay had been updated to reflect one free night
Not sure when your trip is, but you have to submit the claim within 24 hours of your booking, and it must be at least 72 hours prior to 6pm of your check-in date. Definitely worth it to shop around, saved me over $100
ETA: It must be for the exact same room, dates, and occupancy; they must have the same pre-pay/cancellation policy and the original reservation must have been booked through a Choice Hotels website. Rates available by membership only (military, corporate,
AAA) do not apply either way.