My grandmother, who is now gone, used to make great watermelon pickles. Unfortunately, she never wrote the recipe down. She was from rural Iowa, and the recipe was handed down to her. It probably originally came from the smorgasboard-style spreads of Scandanavia as her parents were immigrants. Do any 'hounds have recipes? Here's one from epicurious:
But I'd like to get more for comparison's sake before I try this one. My grandma processed her pickles, while the aforementioned recipe is for quick pickles, although it does call for you to reboil the liquid three times over three days. I've only ever made quick pickles, but I'd be willing to try real canning. I probably haven't had these pickles since I was twelve, but I'd say they were sweet and sour, less sweet than a sweet pickle, and slightly spicy (as in cloves and cinammon, not hot peppers).