Go to Missouri and your dog will be exposed to fleas, ticks, and heartworm bearing mosquitos. Get NexGuard and HeartGuard, both are a once-a-month treatment. Give the dog the NexGuard before you go and the heartworm after. The former will kill fleas and ticks that bite, the heartworm will kill the worms before they afflict the dog's heart. Both tabs are chewable treats your dog will love, so no trouble to administer.
You and the DW will want to check each other very closely every evening for ticks. Perfect excuse for an inch by inch look-see. Ticks crawl around for a while seeking a perfect hiding place before biting, then they need to be attached at least 8 hours and probably more like 24 hours before there is any risk of disease, so you've got lots of time to remove them. And the proven best way to remove them is to use pointed tweezers to grab 'em as close to the skin as you can and pull 'em off, being careful not to squeeze the body. The old wives tale about leaving head or mouth parts is hogwash.
Where I live you can't step outside 9 months of the year without picking up ticks. They are annoying but not really a big deal.