Personally I'd recommend Little Farm on the River, haven't stayed there but talked to the owners, very nice people, and know the location. It's on SR 56 between Aurora and Rising Sun Indiana. Puts you about 45 min from the Stadium by the time you deal with traffic and parking, also puts you between 2 Casino's (Hollywood in Lawrenceburg and Grand Vic in Rising Sun). Another possibliity would be Indian Lakes but it's a 1000 Trail resort w/ limited full hook up and depends on availability of members and not sure about a month long stay, it's a bit more rustic and a typical 1000 trail resort, that will put you close to I-74 and also about 45 min to the Stadium.