To or not is a personal choice. Some do, some don't. I've covered ours since 2008. We live in Nebraska, so deal with ice and snow every winter. Covers aren't cheap, last 2-3, maybe 4 years depending on the winter weather. I use ADCO covers and got 4 out of my last one and new one I put on last winter had a hole I had to patch due to extensive ice build up in the front this spring. Need to cover all sharp edges before covering to prevent punctures. They keep blowing snow out of the A/C unit and keep the roof protected from ice and snow. I see many trailers in storage areas every year and maybe only a couple of them have a cover. Hope this gives you something to think about.