I have built 3 Balsa USA Fokker DVII's. I used CA on the wing joints on all 3. My first I lost in a mid air, but the second one I have 2 years of flights on it. Not a problem. I did not use fiberglass, or epoxy. You of course are free to do it however you want. But I have never had any issues. Just my 2 cents.
P.S. You are going to love how this bird flies!