I absolutely use lanyards there. We stay onsite so there's a keycard. Then there's the Express Pass which is a separate tyvek card. Then our APs which are also tyvek. Plus a CC and ID and insurance card...oh yeah, lanyards for us. I use a Witz brand "See it Safe" hard plastic, waterproof "pouch" at the bottom of my Ravenclaw school tie lanyard.
If it weren't for water, phone, and sunscreen, I'd be bag-free there.