Wheel alinement

I had mine checked two years ago by a trailer frame and axle shop right before I put new tires on. No particuar reason to do so but I did. They were out of alignment. The alignment guy told me some camper owners have them checked annually as part of thier routine maintenance. He could have just been saying that to generate income who knows, however this company has been around for longer than I can remember and is considered reputable. I'm not planning to do it every year but I don't think it hurts to do it every few years no more than it cost ($175). For me, the hassle of taking in to town and dropping it off is the bigger issue.