My wife and I have been very fortunate in our long distance hikes - we've never been rained on except for our last day on the way out. So, while we have rain jackets that we pack, we've never packed rain pants or anything like that. We do have waterproof (Gore-Tex) boots.
Recently we were day hiking in the rain and our pants got so wet that our socks started wicking moisture out of the pants and into our boots. So we need a way to fix this.
It seems like gaiters or rain pants are the two fixes for this. Our pants are quick dry so I'm not as concerned about them getting wet. Gaiters seem like something we could wear all day if the weather seems iffy (under our regular pants but over the boots and socks) while rain pants would be something we put on when the weather starts to get bad. Is one of these a superior choice? Are there other alternatives we should consider?