Hi Laurel,
Boy oh boy can I relate. We had a flood and we were in a hotel (2 kids, 2 dogs, 3 cats and my hubby and I) for THREE MONTHS!!! ugh!!
What you should probably do is over value it. I don't mean that dishonestly, but in order for you to actually replace all that fabric at current values you would have to probably pay more now because it's not easy to find, plus prices of cotton has cone up. They figure in how old it was and deduct from that. Then when you actually replace it, if it's more than they gave you, you report it and get another check cut. Easy to do with a tv not so easy with fabric.
There was probably a lot of fabric in each tote... We learn how to make stuff fit. I have no idea how many yards you should claim, butni would claim them at $12 a yard, however many you have. Then IOU can just be done with it.
Good luck.