Once the lineup cards are submitted (approx. 5 minutes before game time), the umpires take control of the field and the crew chief becomes the person who decides whether to delay or postpone a game (and if/when to restart).
A firewood moisture meter can be used to determine the moisture content of your firewood, but are they a necessity or just a novelty? Seasoned firewood is considered to have a moisture content of 20% or less.
The moisture meters are not specifically made just for firewood. They can be used to test the moisture levels in a variety of different materials. Depending on the model you choose, they cost around $15-$35 and have an accuracy of around 1-3% which is more than enough for firewood.