Just my opinion as I don't know your kids but that's a lot of fishing for kids that age. The perch trip will keep them entertained but keeping them interested in casting for walleye and bass will be difficult. I have fished Erie with kids a few times 11,10, and 9. Eries waves are unforgiving to many kids. Many a nights after fishing all day that I almost fell down in the shower once I got off the water. Just temper your expectations because they may be done in a couple hours. I also wouldn't be afraid to throw out a nightcrawler u might not get your target fish but pick up a cat or sheepshead and the kids will love reeling them in.