Johnny, The last two years I've used a Sitka turkey tool belt. It is a little more roomy than a chest rig and I can carry some snacks, TP, turkey tote, water and a couple other minimal things along with calls and spare shells. I have an FHF Gear box call pouch on the belt to carry my Thermacell.
For hunting in the rain it has a built in "waterproof" cover. Quotes because I've never tested it but that's how it's advertised.
As far as chest packs go I have an Alaskan Guide Creations Ravus that would be a good start to a chest rig. You might look to the T&K Hunting chest rig also it looks pretty cool.