Nothing wrong with double clutching. Figure out how to do it well and keep driving.
The operators manual for a Roadranger transmission explains it pretty good, its required (every time) to shift one of them.

It boils down to you matching speeds of input and output for the gear you want so it'll slip into place. Its a little more than just pushing the clutch in twice.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-