As long as you didn't move any livestock, it shouldn't be much of a gamble. When I've used dry rock, I seed it in a durable black Tupperware/plastic container before using it in a display. I use water from my water changes for the bacteria and a small power head to keep circulation.
The first time I did this, I used 50lbs dry and 30lbs seeded live rock. It took a month for my levels to stay down and I was using Seed. Ammonia peaked several times before it finally stayed down.
Test you're levels daily, if you have anything you want to keep alive in you're refugium, pull it out and keep it somewhere else.
Good luck