This is probably one of the most toughest choices, as I love these episodes to pieces, and are on my top five greatest SpongeBob episodes of all time. The Camping Episode was great with song and all the fun you can have outdoors, and there was also the appearance of the sea bear and sea rhinoceros!
But I'm gonna have to go with Chocolate with Nuts, this episode is very funny and entertaining, and I loved the whole idea of them selling chocolate bars, plus they score lots of money and get a reserved table in the bottled ship restaurant at the ending.