I've been down to the Austin area twice in the last few months and played a few of the courses mentioned. I would highly recommend Spanish Oaks if you can gain access. It is a significantly superior course to the two Barton Creek courses (Foothills and Crenshaw) I played over the same weekend in early July. It has a vastly superior routing than the Barton Creek courses and was in much better condition. I haven't played AGC or ACC, but I would be surprised if ACC is better (AGC may be). Spanish Oaks is one of the best courses I have played in the state and is only 15 minutes away from Barton Creek. If you get the chance to play it, it will be the highlight of your trip.
I liked Wolfdancer better as well, although not by much. It is on good land and on balance I think a little better. The complaint I have with Wolfdancer is they should flip the nines. The least interesting land, and holes, of the course are 14-18. With the first and tenth holes very close to each other, there would be better balance, and a better finish this way. Well worth playing if in the Austin area, but I would imagine the drive would be 30-45 minutes.
Escondido and Summit Rock are two private courses in Horseshoe Bay literally across the street from each other. I liked both better than the Barton Creek courses as well (Escondido a lot better), but they are an hour drive from the resort.
As to Barton Creek, I'm sure you will enjoy yourself. I have never played The Canyons course, but many whose opinion I trust like it the best. I played a fast evening round racing the sun on the Crenshaw course and would like to get back to see it again. The start and finish of the course are typical hill country golf that is not done as well as the Foothills. However starting on I believe the 4th hole, the course enters an extended parkland style stretch, and it was a bit of a revelation. These holes are bunkered very well with the best turf condition of the two courses, and with almost all the massive greens running away from the player, it opens up many different options. This was to me by a mile the best stretch of golf of the two courses. I liked the best of the Crenshaw course quite a bit more than the Foothills, and I also disliked the worst of the course more. That being said, I liked/loved the middle stretch enough (as well as the better green complexes) that I would rather play this course on a return than The Foothills. I would hold the minority opinion on this matter.
As mentioned, The Foothills does Hill Country golf better than the part of the Crenshaw course that attempts this, and this is why it has more fans and gets more play. More “cool drop shots”. While the course does have some excellent holes, for me the greens didn’t hold much interest or challenge. They are small, grainy, spongy and pretty slow. They do putt true. Both courses are Tif Eagle greens. The Foothills was on balance in better condition when I played, but neither were stellar in this area.
Get yourself to Spanish Oaks.