Knowing that some on this site use radios such as the Yaesu FT-817 and similar, you might be interested in the products from this company for man pack portable:
Http://www.portablezero.com
I have fitted my 817 with the side rails and also have their Sherpa pack. I can now carry the radio, antenna tuner, mic, morse key, antenna, log book (yes, I still keep one...) and quick reference book for the radio all on one pack ready to go.
Usual disclaimer: no connection with the company...satisfied customer...etc etc.
Regards,
Keithb