I've only bothered riding the coasters once (Dragons a few months ago) since they started the whole metal detector ridiculousness, but they always include wallets in what they tell you to leave the lockers when I hear them walking by, and I did see someone sent back to the lockers at the wand/detectors point for their wallet that day. If they have indeed relaxed on the wallet issue, then I'm only concerned about the small numbers of larger lockers, but that's not as big of an issue. Still not happy about leaving the phone in the lockers when I'm solo and looking at a line longer than about 15-20 minutes, but it is what it is.