bad idea! tarps are not breathable, like a RV cover is. plus they are abrasive and can damage the roof or sides.
i found out when i tarped my trailer during the winter. when i took it off, the whole roof was covered with mold/mildew.
i got an ADCO cover and after 4 months of winter, when i took it off, it was as clean as it was when i first covered it.
the only way you can tarp, is to suspend the tarp over the trailer, so that it's not touching.