Don't stay in Anderson,you can stay in Gas city,or Marion for the Gas City race and in Kokomo for the Kokomo race.Or one or the other and have a half hour drive from hotel to track for one race.
Check the Days Inn in Kokomo..been staying there the last few years for Smackdown and it's fairly cheap and clean. That way you'll be half an hour to Gas City and already in Kokomo for the next night. Close to the Halfmoon, TX Roadhouse and Olive Garden to boot.
I used to follow each race for the week. These days, I get tired of unpacking and repacking every night. I just set myself up in Indianapolis and commute. Longest drive is Lawrenceburg, then I check out and stay at the hotels south of Haubstadt on the last night. As far as price, I stayed at the Candlewood Suites Northwest Indianapolis the past two weeks at $89/night. Adequate room, full fridge, kitchen. I will be staying there again this July.