The number one reason for hiring a guide is obvious, you want to catch fish. You may be visiting the area for a day or for a week or two. Either way you want to make the most out of your visit. Hiring a guide is a great way to put the odds in your favor.
Not only are most of the Lakes very large but also the amount of fish holding structure can be over whelming. Fish location is very dependent on time of year, and can change from day to day. Even though fish were active in a spot one-day does not mean they will be there the next. You need options, spot options. My Lake experience will provide that for you.