Blowing lines won't hurt anything if you're blowing to get the pink stuff out. But don't follow up with fresh water yet.
We're heading to South Carolina in a week (Andrew Jackson State Park). Midway we've schedule a stop at a KOA. I'm un-winterizing there. I will have full hook-up, can run as much water as needed to clear the lines of pink stuff. Hopefully, won't have to winterize again when returning home to Indiana.
If you have the advantage of full hook-up at your destination, unwinterize there. As goofy as this weather's been this winter, you may want to wait till the last second to un-winterize (and should be in the Southern States). We could still get a cold snap before you head South. Do it (flush with fresh water) where and when you know the temperatures WILL remain above 32F.