If there was that many holes though, I would just line the inside walls with 1/2" mylar faced (textured to scatter light) r-tech rigid foam insulation panels that cost like 10-15 a sheet.
Four 4x8" sheets worth would cover inside a 4x4 tent, but you would loose a small negligible amount of total sq ft.
Cut out any holes, ports, or seams needed. Use velcro to install it, for easy removal when needed. Especially around access entryways, that might need to fold away to access, etc..
Should be such a tight fit, if you measured and cut properly, that you don't even need to tape off any corners/seams.
Having an extra insulated tent with higher R-values is so much better than not. Benefits like sound deadening, sealing off and using c02 w/ AC efficiently, and more overall control of the environment inside no matter what kind of system or location. Higher CFM fans without the walls sucking in from negative pressure... The list goes on.