Here's a nice minimalist wader workstation from Soldarini. Here's what they have to say about it.
RCX Minimal Pack
Lightweight and practical chest pack to hang on the waders. Equipped with adjustable straps, a large central compartment closed by a zip and two small pockets on the front where you can store small accessories and spools of tippet. Suitable for all dynamic and rational fishermen. Although small in size, it guarantees the space to have everything you need
