The balloon cannot be set up and inflated safely by the pilot alone, therefore the hot air balloon crew will usually be asked to help with one of the following duties:
After laying out the envelope and rigging the basket and burner, the envelope will be inflated with cold air using the inflation fan. Once the enveloped is filled with cold air, hot inflation commences. The powerful propane burner is used to heat the air within the envelope until it is vertical above the basket.
Regardless of which tasks you to are asked to perform, there a few golden rules:
The mouth crew assist with the inflation by holding open the mouth of the balloon until there is sufficient pressure within the balloon envelope. They should stand outside the wires and by holding onto the bottom of the balloon mouth fabric create a large opening. During the hot inflation the mouth crew should move behind the lower fire proof fabric panels of the balloon.
Once the balloon envelope has been filled with cold air and the hot inflation is started it is very important that the top of the balloon (the crown) is restrained from rising too quickly. If this happens a bubble of hot air will fill the top of the balloon and cause the mouth at the bottom to close. In extreme cases this will cause the bottom of the balloon fabric to become scorched, when the burner is used. If is therefore very important for the crown crew to restrain the top of the balloon from rising too quickly during the early stages of the hot inflation.
The combustion engine driven inflation fan is probably the most dangerous piece of ballooning equipment. The fan will be positioned in the correct position by the pilot prior to cold inflation. The fan should be angled such that the airflow created will enter the envelope through the mouth. The fan will be started by the pilot and initially run at low speed during the early stages of cold inflation. Once the parachute has been fitted to the crown the fan speed will be increased to full. It may be necessary to move or tilt the fan to ensure the most efficient filling of the envelope. Once the mouth of the balloon lifts clear of the ground during hot inflation the fan should be turned off and moved well away from the balloon. Before stowing the fan in the trailer the fuel supply on the fan must be switched off.
Once the mouth of the balloon is clear of the ground, turn off the fan and move it well away.
The basic principle of a retrieve is to safely follow the balloon and pick up passengers and equipment at the end of the flight. The balloon track will in general follow a straight track. Travelling by winding country roads will mean that the retrieve crew will travel 4 to 6 times as far as the balloon during a retrieve.

Balloon Crew Photo after Flight