Haven't used the propane stove in 3 years. Is there usually a smell when it is turned back on?

Just moved into an apartment that no one has lived in for about 3 years. We filled the propane tank (100lb tank) for the hot water and oven. We turned on the gas a lit the pilot light in the water heater first. No smell. We went to the kitchen and turned the burners on, no smell. We turned on the oven, no smell. After everything was turned off I went to the neighbors house for about 10 minutes and came back to a very strong gas smell. My husband said maybe some of the gas needed to burn off so we turned the oven on 200 and let it run for about 10 mintues.It still smelled but not as strong. I shut off the gas when we left for work. Later that night I turned the gas back on and shut off the gas to the stove. I was wondering if it is normal to have such a strong smell since it wasn't used in 3 years or if I need to spend the money on a repair person? I have a baby so I don't want to keep turning it on and off and letting the fumes come in the house. I know the gas lines ped an inspection about 18 months ago when the property was purchased.