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Plugging any gas threaded holes with anything other than the proper size threaded plugs is inherently dangerous, because all putties, including the epoxys tend to shrink over time. This shrinking is what's lead to your present situation. I suggest, for safety's sake, that you have a repair person remove the putty plugs, and, either insert threaded plugs, or, better yet reinstall the pilot lights.
Some think that the pilots waste gas, but one of their most important functions is to light off any gas coming from the burners should the burner valves be accidentally left on or bumped into a 'on' position. The small cost of gas usage is a small price to pay for the safety the pilots provide.
In order to replace the pilot valves the putty must be removed and the original threads cleaned with a thread tap. The adjustment screw on the pilot valve is for adjusting the gas flow at the pilot cap, although they can be used to shut off the gas supply as well.
Anyone who maintains their vehicle can do the job for you. If you don't find someone, you do as you have been, until the opportunity to find an RV dealer.