Hey 237sparky! Welcome to ScubaBoard! I take all my equipment on trips. I have a roller bag dedicated to scuba gear, so it's really not an issue for me. I always carry on my regs and computer, because stuff gets tossed around and stacked on in cargo holds. Be sure to get a plastic case for your mask, and be careful to wrap something soft around your BC inflator.
If you decide to rent, definitely check your ENTIRE scuba rig before you walk out of the rental shop. I've seen some expensive dives ruined because of rental gear issues. Whatever you decide, have fun!!
John