i have about 10k miles towing on my 33 ft tt thought i would check the brakes and pulled drum of to my surprise i only one wheel had any brake lining left i was stopping with only 1 wheel brake ...
After having the linings come off the shoes 3 years in a row and taking out the drums the 3rd time, I bit the bullet and installed disc brakes. It was going to be $1300 to replace all the brakes and drums, I bought everything to install disc brakes for $1600. It took less than a day to install, and haven't looked back.