Judging by the number of questions I receive on this topic it is apparent to me that quite a few other RVers experience the same problem you are having. Take a moment to review the answers I gave in response to the questions below to find out what options are available to you to repair and prevent future flooring problems.
Since you are going to have to replace the flooring in your travel trailer, let me give you some suggestions on where you can get great deals on new flooring materials and supplies. The first place to look would be Shopzilla Flooring Materials they have a huge selection of flooring material and some excellent sale prices. Another place to look is Amazon.com, they also have a good selection of flooring materials to choose from. You might also want to look for Flooring On eBay.com.
I wish you the best of luck on getting your travel trailer's flooring issues straightened out.