You would be about 2.5 hours away from the Bull Shoals Tailwater, not from the White River. Beaver Lake is the White River. The Beaver tailwater has several (8) miles of stocked/managed trout, but every stream that runs into Beaver should have small mouth. as well as the lake itself. Also immediately in the NWA is the Illinois River and it's tributaries, all smallmouth waters. NWA is about five minutes away for me and in years past I fished it more than I did SWMo., but it's been long enough ago that I've forgotten details and place names. Any stream in the area other than the tailwaters of Beaver and Table Rock lakes should hold smallmouth. I think every stream in the entire Ozarks region is a small mouth bass stream, but. I haven't fished all of them, so that's just hearsay.
However a search for "Arkansas blue ribbon smallmouth bass streams" will find
" Two of the best Smallmouth streams in America are located in the Arkansas Ozarks - Crooked Creek and the Buffalo River. These two streams are currently Arkansas’ only designated Blue Ribbon Smallmouth streams."Like almost all the waters in a Ar. these are both SE of Beaver, one may be your target water.
Also nearby in Mo. is a trophy smallmouth (Neosho subspecies) stream the Elk River, roughly 1/2 hour from Rogers or about an hour from any place in NWA-
https://mdc.mo.gov/fishing/regulations/special-waterbody-regulations/elk-river Headwaters of the Elk are in NWA, but pretty small waters.
[since the states promote these waters, I don't feel that I'm giving anything away]
I only know of one fly shop in NWA, McLellan’s Fly Shop, Sunbridge Dr. Fayetteville, Arkansas although Tim's Fly Shop, Cassville, Mo. is very close (1/2 hour from Beaver Dam or from Rogers, iirc) and an excellent source. Both would likely recommend guides and have suggestions for DIY outings. There is an Ozark anglers forum, mostly concerned with casting and lake fishing, but some members are fly users and almost every stream in the region has a dedicated sub-forum. Questions or PMs with members there (some of them guides) might get you more details.(feel free to PM/email me if you think I can help more)