The largest lake/reservoir in Indiana is between Bedford & Bloomington (Monroe Lake) & 2nd largest is just south of Crane (Patoka Lake). Those are great for fishing, boating, etc. Both have beach areas. Additionally if your job "near Crane" is code for "at Crane" there is a very sizable private lake on base with really good fishing, camping (cabins & camp sites), boat rentals, and more.
There are plenty of things to do in the area. But I can't make a comprehensive list. What type of things are you interested in? Shopping? Parks (nature or for children's play?), rock climbing? Casinos? camping? Scenic views? History? The area has them all.
Yes, much of the area is rural, but if you don't like rural there is city as well. I live 20 minutes from Bedford, very rural, I have a 3/4 mile long driveway, can't see the road, can't see the neighbors, and I can do whatever I want without people watching me. If your job is at Crane you can access the base from several different gates. If it's at West Gate (near Crane village) it will be really inconvenient to live on the east side of base but there are people who do it. Housing "close" to Crane is still usually a 15-20 minute drive. Crane is so large it take 5-10 minutes to get from the gate to the "downtown area" where most people work. Factor in that a house "close" to Crane may still be 10 minutes from the nearest gate and the result is "close" isn't "fast" for a morning commute. Traffic is something you won't have to deal with though. The worst traffic is what the locals call Crane Trains. Crane employs about 6,000 active duty, civilians, and contractors; many of them work on base. So in the mornings there are a lot of cars going in the same direction (opposite in the evenings). There's always that 1 guy that does right on the limit (or below the limit) and there will be a stack up of cars behind all doing the same speed. It's frustrating to rural folks that aren't accustomed to traffic but it's nothing compared to the traffic of big cities.
That said, geographically the area is diverse. On the south, north, & east sides of Crane it's rolling hills and winding roads, lots of wooded terrain and beef cattle production. On the west it flattens out so there is a lot of row crop agriculture. There is a large concentration of Amish around the SW of Crane (Loogootee, Washington, Odon, etc) with some to the SE (Orleans & Paoli).
Bloomington is very liberal, the rest are very conservative. Bloomington is the only thing close to a big city. If you can tolerate liberal tax & spend, corruption, & fruity policies like turning a major cross-town 4-lane thoroughfare back into a 2-lane street with bike lanes it's actually a nice city.
I was a transplant here over a decade ago. Now I can't see myself living anywhere else.