A method includes: mounting a structural tunnel frame to a crop baggingdevice, thestructural tunnel frame being pre-loaded with a tubular bag, which is in afolded stateencircling an outer peripheral surface of the structural tunnel framesupplying a crop fromthe crop bagging device into the tubular bag and feeding the tubular bag fromthe structuraltunnel frame as the tubular bag fills with the crop. An apparatus is disclosedcomprising: astructural tunnel frame defining a crop-bagging-device-tunnel-shroud-receivinginterior thatextends between a crop supply open end of the structural tunnel frame to acrop dischargeopen end of the structural tunnel frame and a tubular bag, which is supportedin a foldedstate encircling an outer peripheral surface of the structural tunnel frame.