I think the red zone on the meter you mention starts about 110. If it would stay at that point, when running your electric appliances, and AC, you would likely be okay.
However, if it is in the red, with none of your appliances running, it will likely drop even more. I would not use any appliances on electric, when the meter drops to 106.
I would think the camp owner would know that this problem needs to be corrected!
One other thing, if your battery is charging at full rate, it will cause the power to be lower, until battery is charged.
Jerry