I built a Red Oak Board Bow as an expeirment. Mine is 68" nock to nock. The experiment fer me was , could I use Titebond III and glue Bamboo to the Red Oak. The answer is yes. It worked great. Tillered the bow down to 47# @ 28". I have been shootin it fer a year and a half every week. Actually, the Boo or Hickry will give the bow some extra speed as well. Oak is not a real fast wood, but good and stable ifin its straight. Plus I find it economical to learn with. I mess up every now and then on the tillerin, and have to start a new one. The RedNeck way a learnin!!!
I would caution though...Ifin ya back with Bamboo...2" is probably too wide...the Boo will over power the Oak. Because of the way Boo grows, when it is bent (assuming you are usin the natural barked boo as a backin) it will put pressure on both edges of the limbs, and could crush the Oak. Ifin I was usin Boo, I wouldn't make the limbs no wider that 1 1/2" at the fade.
I did build a Pyramid Bow out a a Red oak board with no backin that was 66" nock to nock and it perform great as well. but it was 2 3/4" at the fade. ***NOTE*** I am a old RedNeck, learnin to be a Bowyer, one stick a wood at a time. I have not built many bows, but have one er two goin all the time. I look at every failure as a lesson, and try to learn from it. I have a pile of lessons standin in the corner a my garage!!! There are a lot of actual "Bowyers" on this site, that can give ya some real sage advise. Ya might take mine with the fact that I am a "Apprentice " .
TheWildCat