Jim. I subscribe to the same theory as you. More air tanks are cheap insurance. Most of my planes will hold 100 psi for 2-3 days.
I safety wire each connection, generally use sierra or robart valves, use the Mcmaster Carr lines, and on new retracts I usually dissasemble the cylinders and check for burs and lube the orings with air tool oil. It is amazing how many "highly regarded" brand retracts have crapola in them left over from machinig or have damaged orings from being assembled dry.
For a pump, I have a $50 campbell hausefield self contained rechargable flashlight/ compressor combo from wal mart. I made up a pigtail with a robart fill valve, a short piece of air tubing, and a fill chuck. Nice thing to have as you can fill up the tires on your car or bicycle during the off season.