I have some feedback because we actually have some experience as guests on all 3 markets.
1. Broken Bow - I remember this market had a lot of attention a couple years back because it was a relatively cheap market. We were considering this or the Smokies. We've tried to go here a couple times already but got turned off by the fact that there's nothing to do there as a family. From Austin, it's too far for a spontaneous getaway. The cabins in the area are new and amazing. But as an investor I see that as a high level of competition in a market that doesn't have enough draw for families (mine, at least).
2. We had family in Houston so we're familiar with Lake Conroe. Nice lake. We stayed at the Margaritaville resort there and want to go back. To us, the draw is the resort and their water park. But it is a nice area.
3. Hot Springs feels niche but we enjoy it. Our first time through we stayed at a small lake house on Hot Springs Village (the owner was renting out the basement). A couple of months ago we stayed at a cabin just outside of Hot Springs that was surprisingly nice and within driving distance of the town (we were only passing through).
Personally of these three, Broken Bow would rank last but that's only based on a feeling. I haven't run any numbers.