Team Waldron

I’ll be going to Vancouver for a couple of days and there is an Adventure Lab near where we are staying. I wont have online coverage once I’m out in the field. Do Lab caches work offline? I know that all you need to do is to have visited the zone for a “leg” and it can then be answered later, which I could do by recording the answers but if I get the answer wrong then I’ll be in a pickle. Thanks in advance. Glenn