depression glass appraisals?

I have 4 cabinets filled to bursting with green depression glass that I've been collecting for 30 years. The cabinets are 7 feet tall x 7 feet wide, so it's obviously a LOT of glass. It needs to be cataloged for insurance. How would I go about finding someone to do that?

Tearoom, Pyramid, Romanesque, Sierra, and elegant stemware, shot glasses, vases, candlesticks, kitchenwares, ashtrays, plus lots of odd and unusual pieces. I don't know if I should sell it someday or leave it to the grandkids or put it in a museum. I really do need some professional help and advice.

Your thoughts are appreciated.