I guess the answer really depends on to what you want to attach it, and where. The best mounts are going to provide some vibration insulation as well as protection for your new Christmas present. But it shouldn't be so heavy as to throw your CG off. Also, do you want to do some remote pan/tilt?
Will that plane carry the weight of a gopro?
It's best to mount over the CG if you cannot move the battery to adjust the CG forward or backward, so over the wing is probably the best option here. You might want to think about getting a keychain type camera for this plane since it's lighter and more streamlined and easier to mount than a gopro.
if you opt for rubber bands i would suggest using the 3m Command Clear mini hooks. it will require of you to superglue them to the plane (CA) but are barely noticeable when not in use. i would suggest you sand the bottom of each hook lightly first to provide better adhesion. I have used them to hold Bixler wings together in the past with great success.
My first RC plane was a Firebird Stratos and I too wanted to mount my gopro to it. I simply put it in the standard waterproof case and duct taped it upside down directly under the battery hatch which actually turned out to be spot on for the CG. HOWEVER.. that was incredibly stupid of me and I would never put my gopro on such an underpowered plane. below is the video to prove I actually did it but that was the only time I tried and have since moved on to the apprentice which I mount my gopro to with duct tape and "the frame" mount by gopro. The apprentice is an incredibly easy plane to fly and can carry all my FPV gear well.
hope this helps!