Thank you all for your suggestions.
I'm kind of in the charcoal camp myself, but unfortunately I couldn't find any but I was able to find apple cider vinegar (ACV) and baking soda so I'm going to try those first.
This morning I closed up the camper after having placed 3 bowls of ACV inside. I have the fan blowing to move the air around. In the 3 minutes I was in the enclosed camper with the ACV it already started to smell better, let's hope that lasts.
Waiting in the bullpen are the boxes of baking soda.
I'll keep you posted on what works/doesn't work.
Robin, I understand you completely. Finding the source of the smell is important. To be honest I think it is a combo of the Febreze, Scrubbing Bubbles, scented 409, Simple Green, carpet cleaner and paint
I used to get the inside to sparkle. It looks beautiful. Obviously, the smell isn't good.
I also think I went a little psycho with the Febreze. I too have a sensitive sense of smell, but unfortunately I also have the patience of a gnat on crack. All the cleaning I did got rid of 99% of the musty smell, but I was too impatient to wait for it to air out so I sprayed Febreze until I was suffering from carpal tunnel syndrome (or close to it). You know the old saying, "If a little is good, a lot must be better." Well, with Febreze it ain't so!!!!
Gina, they just celebrated Hemp Fest here in Seattle, maybe I should have hosted a card game for a couple of attendees. :-) That would have definitely changed the smell or my attitude towards the smell.
Well, let's see how the ACV goes.