Which side of Indy? That makes a fair bit of difference.
Just north of Indy (Sheridan), there is Come Again Farms (is that where you attended camp?) which is run by LAZ on the boards here. I’m sure she’ll chime in, but I know CAF has a full xc course from GAG to Prelim including water, ditches, banks and nice facilities with multiple rings (2 each indoor and outdoor), grass galloping track, big pastures for turn out, really nice stadium fences and lots of improvements each year.
Just south of Indy (Greenwood) is Dan Hobyn Stables. I haven’t been there in a while but I know it has been recently revamped and brought back up to date. Full xc GAG to Training I think & indoor and outdoor ring.
ETA: Also, southeast of Indy (Fairland - near Shebyville/Indiana Downs) is Fairland Farms. I’ve never been to the facilities, but hear it is lovely. I know the family that owns the barn and the trainer and both are good people.
Those are the [three] big active barns in the area. I’m sure there are other smaller barns that I just can’t think of right now.
Since you’re thinking of joining the dark side in Indiana (yay btw!), I also have to include a plug for IEA (Indiana Eventing Association). Great organization with lots of benefits for members and good people. PM me if you want more info 