I do have a flip over that I use for angling. The one I have is too short and too bright inside for spearing. Last year at the end of the season I shopped for and purchased a 6' by 6' hub that is tall AND dark inside, black material and the windows have really good covers. I bought it just to spear from. I'm pretty sure the shelter I have will be just fine, was only wondering about the need to cover or not cover the ice (floor).
Guessing that I will be only leaving the hub erected while I am there spearing, don't plan to leave it out unattended. Obviously I will be leaving a maker to warn others about the spear hole in the ice.