The lounge storage is fairly secure. A dedicated bag check attendant takes your bags and gives you a claim slip. The lounge is large and busy enough that you can easily leave (keep your claim slip!) and come back later to pick them up. Upon retrieval the attendant will expect a tip, though at a buck or two a bag, I don't know if it's more than a locker would be.

Also, note the line to check and retrieve bags in the lounge can be lengthy sometimes.

Don't recall the lounge's hours.