I have a older Marcum VS 350 model. Cost me $150 about 5-6 yrs ago. I works great for me. Had a couple cheaper generic UC before that, they where junk the cam lens would fog up, sent them back.
You get what you pay for, Marcum is a good one. Mine ain't foged up every.
The new more HIGH Dollar ones are LCD and colored, my older one is B/W and looks like a mini TV.
Lakes I have used my UC on.
Maxi: I can set my cam up 10-12ft out from my shanty, drop down 3 lines and see them all in deep water.
Bass: Not as clear as Maxi but still can see all 3 lines in shallower water.
Nyona: That lake has cleared up. I have one hole 26ft deep I can still see but have to set up shorter from shanty, about 5-6ft.
Never used it at Manitou so no idea.
I don't even fireup my Vexilar when using the UC, no need for it. When I see the fish suck bait in I jerk. U will catch more with a UC,why? Cause some fish can suckin and blowout your jig and you won't even know it. I don't care how sensitive your pole is some bites are undetectible. I have used 2lb test with spring bobbers and watched fish bite and not feel or detect the bite.
UCam's are just plain fun to watch, even if you don't catch a fish. 5 yrs ago up at Maxi, my "fish" looking cam must of Pe-od a smallmouth off. He would swim in and attack my cam, then dart off. About 5 minutes later he would come back and do the same thing. He did this about 3-4 times but never would hit my Rapala or live minnow.