Also if adventure is your game, and you wonder around through town were you see farmer and stop and talk to them, even offer to learn from them, you'll more than likely get a free meal, and even a bed for the night. I would also suggest once getting to the DR buying a couple of jars of Peanut Butter, you'll find bread in most place (I say most because the bread we got in our village was always stale but edible with lots of coffee). As you move away from coastal town and into the interior you might find there is more to explore...(I'm predijudice because I lived in the mts. there). Also you could splurge a bit and hike pico duarte, there you will be under the stars. You have to hire a guide. I lived in the DR off of less than $200 a month, including rent, food, transport, etc. My rent was only $12 dollars. I did this for 2 1/2 years. Hitcking is a great way to see the country, just flag down a pick up truck and ask for a ride. You'll also meet many people there interested in you and what to learn about you and your culture.
Good Luck,
K.J.