Since I was going to replace the rollers, I decided to also replace the belt, felts front and back, and front glides. I found that the felts, glides and wheels were worn appropriate to the dryer's use. The squeak might have been that the idler pulley was hard to turn. I used WD-40 to clean and loosen the pulley bearing and it then spun for about 20 seconds after a spin. I cleaned all of the lint, hair-pins, sand, etc. out of the interior and replaced the rest of the parts and now the dryer runs like new. I did find a large lint obstruction just below the lint trap holder. It was about a 90% blockage.
One note: when ordering the felt, it was suggested that I buy the high-temp adhesive, which I figured was needed to attach the felt. It turns out that the felt is held by small metal bendable tabs about 2 inches apart all around the front and back drum ends. I did not need the adhesive. I am not messing around with a return on this item (I'll need it for something else as soon as I return it).
Under tools, I also needed to use spring clip pliers to take the support wheels off the axle. I did not remove the back drum end or air intake tube.