In the numbering of the Levites, the males a month old or more were counted.  Not so with the other tribes.

Did you ever wonder why God warned the people about touching the holy things in the tabernacle? The warning came with a stiff penalty for not honoring God’s warning. Did God ever have to follow through with that penalty? Check this out.
1 Chronicles 13:9-10
When they came to the threshing floor of Kidon, Uzzah reached out his hand to steady the ark, because the oxen stumbled.(The ark was not supposed to be carried by oxen) The LORD's anger burned against Uzzah, and he struck him down because he had put his hand on the ark. So he died there before God.

The descendants of Levi are given specific duties. Aaron and his sons were given huge supervisory responsibilities over the Levites. All together there were 8,580 men 30 – 50 years of age who were responsible for the Tent of Meeting (tabernacle). So whenever the pillar of fire or the cloud would move giving the people the signal to move, there were quite a few men taking care of all the moving. Someone was in charge of something as seemingly insignificant as the tent pegs. There is a great lesson to be learned from this division of duties. No matter how insignificant our God-given task may seem to us, it is important to God. And it is important in the grand scheme of things. After all, what would happen without tent pegs?

By the way, the overall size of the tabernacle was 150 feet by 75 feet, about half the size of a football field.

Fascinating tidbit of information…in the Millennial Kingdom, the cloud and pillar will once again return.
Isaiah 4:5
Then the LORD will create over all of Mount Zion and over those who assemble there a cloud of smoke by day and a glow of flaming fire by night; over all the glory will be a canopy.

Uzzah suffered a penalty for not obeying God completely. How is it with us as Believers, do we always obey God completely?  There are consequences for disobedience and blessings for obedience.