Definitely eye protection. It gets crazy. I have never fished opening day but been there to just watch and have fun. know several people who have been snagged.
Went down this past Friday in hopes of missing the crowds. Got down too late. Every section I tried to go already had someone on it. Everywhere I fished had already been hit by someone else that morning. Only managed one small one on a prince nymph. Beautiful day though and I wasn't at work!