I use thin and thick CA and epoxy. I use the thin CA for tight balsa to balsa joints. Fit the pieces in the desired position and then let the CA wick in place. The thick CA is for places where I'll be fitting one part onto another, or for ply to balsa joints where the thin may not wick all the way to the center of the joints. Since there are issues with the fumes, don't put your face directly above the joint you're gluing. I often position a fan set on low to blow the fumes away from me. I use epoxy sparingly in high stress areas such as landing gear blocks, firewalls, and areas where I need time to ensure alignment is correct before the glue cures, such as tail surfaces.

And finally, I use Balsarite for fuel proofing and to treat wood before covering. I put 3 or 4 coats in the engine area, fuel tank compartment, around the wing saddle area, and anywhere else I think fuel may creep onto the wood. I apply 2 light coats (sand between them to knock down the fuzz) to the rest of the plane, but only on the wood that the covering will touch. I feel that the covering adheres to the wood better if it's been sealed with Balsarite first.