There is no such thing as a free meal and this feast is no different.
Initially you will need to build an appetite by hiking along a raging river.
Finding the feast is not difficult. Entree, main meal and dessert are easy to digest BUT you will need plenty of etiquette and a huge dose of patience to access the condiment and the main prize.
No need to force anything.
Please return as found so that other hungry geocahers can enjoy a feast of their own.