Mount Bohemia is legitimate. It's not big, and only 900 something vertical but they get dumped on by lake effect snow. Something like 275"+ per year on average. It's hard to get to. Look it up on google maps. It's location on a peninsula that sticks out into Lake Superior is what gives it the snowfall. It can be bare ground an hour and a half south, and it'll still be piling up at the hill. I've gone mountain biking in shorts and short sleeves at home, and then driven up for mid winter conditions at Bohemia.
My first time there, I walked into the base yurt (no permanent buildings, just yurts) and the owner of the hill immediately noticed the Mad River Glen sticker on my helmet. He's a big fan of that hill, and wanted to recreate the feel of MRG, plus snowboarders... He's done a great job.
Mount Bohemia is as good as anything I've skied back east, but gets snow that is much more Wasatch like than you would expect. It's a solid 5 hour drive for me, but it's good enough that when the lake effect is firing, I've made a day trip up there. Of course, since they don't make any snow and do no grooming, when it's bad, it is really bad. Late last season, I skied conditions that are best described as a mix of glare ice and dirt...
If you know you are going to make the trip, they have a one day season pass sale in December for $99. Less than the cost of two single day tickets. I love the place so much that I bought a 2 year pass to support the hill even though I sign on with the patrol and ski for free. Once my kids are capable of skiing there, I'll probably make it my secondary patrol hill.