Bounce, I just noticed that you did have the year and model of your Berk in your post. Sorry I did not see that earlier, I must have been half asleep. It looks like Hank has assisted you now and sorry again for not reading better.
On a side note- I have not had the issue yet with mine, but I did pull the plywood cover out under the bed and found that the bolts were a little loose, so I tightened them.
Glenn and Darcy
2013 Berkshire 390RB
2013 Jeep Wrangler (toad)