I was going to pipe in here too...(Kim here of KimJay)...
Mike, you do not have to have a GPS, but like Jug...I think you will enjoy the comp and tasks much, much more if you have one! Even if you don't have an interest in "competing" per say, you will be surprised how much fun it is to try to run the tasks. Last year we actually had 2 divisions (like Rat Race). We had a "sport" division and then the "open" division for the seasoned competitors. The Tater Hill Open is a fun comp geared towards new competition pilots and the "sport" division is a much shorter task, generally a partial course of the full task, but it is so much fun!! This is such a great learning comp that you should really come with the idea of competing...we have lots of pilots that don't like flying in lots of gaggles or traffic...thats OK! This is the best comp to go at your pace on your time frame! You will learn soooooo much more if you decide to fly with a GPS and it really will help your flying where ever you fly in the future...go with a GPS...it WILL enhance your experience for sure!!! Also, Kari Castle will have week long clinic which will be held every day on the hill...we have found Kari's clinics very helpful in the past and have already signed up for this year! There is a link to her clinic on the Taterhill website.
Look forward to meeting you at the comp!!
Kim