We moved from the city to a farm a couple of years ago. The wildfires in Idaho took out a lot of our fencing. I plan to replace the gate posts with railroad ties, but the perimeter fences are a mixture of cedar and steel T-posts with a few wire stays twisted in. One fence in very rocky ground was mostly cedar posts, in another area every fifth post is cedar. Is there a good reason to replace cedar with cedar? Do I really need the stays? I may not be able to drive steel into the rocky area and may have to use cedar there. Any advice would be appreciated.