Sticks like smurfy said, or an arm full of cattails. I always made sure I had enough lumber marking my holes nothing would sink or blow away and could be seen from a good way off by a snowmobiler.
Like anything else, some people care; some don’t.
Other suggestion, look up some of the old “Look and Release” videos that were posted on the forums in the past. Lotta good footage of nice fish left to swim away.
I use mine on and off fishing. I have a sun shield for mine in the summer. it works ok at best. but I do use it to watch fish and check structure.
I just used it the last 3 weekends tipup fishing. its both fun and frustrating. to watch a pike grab the sucker, mess with it then let it go, and watch there behavior is crazy fun. and frustrating.
I bought a tripod for mine and you can zero in on your bait, but it does take a bit of playing to get it set right. I lost the little rubber stopper so I use a couple winter depth finders. the only downfall is the deeper you need to set it, the more risk you have of a fish tangling up in it!!!!
Very common to find large openings in ice after several 40 degree days, and especially with rain. 8" angling holes can easily double in size overnight after a good rain.
It's pretty hard to "mark" holes at that point in the season. Best time to be out there, in my opinion. But, by all means, if your not comfortable with it Stay Home. For those that want to experience the best bite of the season, just watch your step, and be careful you don't loose that Vexilar down an oversize hole 😆 or get pulled in by a big fish 😢 😢 😢
Won't be long, for me to get the planks and waders ready 😀