That sounds terrible! I know I'd be pretty pissed off myself if any of those things happened to me/my group. I also would put a little blame on the yahoos that put beer cans down the hole! That one pisses me off more than anything.
Sorry to hear you had a bad experience! I have used Appledoorn's for the past 4 years and the service is great. Our first trip this year was slow fishing, but it sounds like that is a common theme for the entire lake. Other years we've done well fishing and always had a great time.
Thanks for the input! We'll probably be targeting some pike with tip-ups and may mix in a little jigging. The bite has recently been terribly slow during the day so a little trip nearby sounded like a good idea.