The previous poster is correct. It's a long way from town, but if you plan on relaxing most of the time and taking 2 or 3 day trips into town, you'll enjoy it. You COULD go into town daily, it's just that the drive is a bit of a drag. May is a great time to go. The sea should be plenty warm for swimming, but the air won't be so hot as to be miserable. The beach is beautiful right in front of the MP.
The thing I don't like about MP is that the kitchen is so small. The fridge is too small to keep much in, and definitely no freezer space. There is just the one restaurant on site and other restaurants are quite a drive. Living close, taking a couple of ice chests worked well for us. There is a nice grocery store in town, called Super Ley if you plan to cook a few meals.