Broke down in Amarillo

We are currently broke down in Amarillo. We made it in to the KOA and now are waiting until tomorrow to hopefully find someone to work on our motorhome. It is a 2001 workhorse p32 chassis. Everything seemed fine until I slowed down to get off of I40 to fuel up. When we started slowing down there was a bad grinding noise coming from the driver side front tire area. The slower we went the worse the sound. At about 30 mph the sound goes away. Luckily the KOA was not far away and we made it there. I can jack up the tire and when you spin it, it grinds and has a catch. That is the best I can explain it. you have to force it past the catch. It does not appear to have any back and forth play. I can grab either side of the tire and try to move it back and forth and there is no movement. Anyone have any suggestions? We are from NE Oklahoma and do not know the area.