On 2:12 hours, RVFD along with other companies, was alerted on Box 3-4 for a shed fire at 9335 Fisher Rd. in Sta.300's (Denton) first due.  Eng.401 (5 w/Chief Utz) checked up on the air and from Downes Station Rd. the crew realized by heavy smoke in the area, this was more than a shed fire.  Eng. 304 (A/C Sefton) arrived and advised of multiple outbuildings and vehicles on fire.  Officer 316 (Higgs) arrived and established command.  Crew of Eng.401 arrived and assisted in fire attack operations.  Due to heavy fire conditions, and limited staffing, command requested the second alarm.  Eng.401 was sent to set up a draft site off of Saulsbury Rd.  Command requested RVFD Canteen-4 to the scene to assist in rehab and refreshments.  After extensive overhaul, units were released.