Hi Guys,
I've found the Surf Expansion Kite (Big white disc) a huge overkill. If you put them on properly, they become practically permanent. We had a customer attach one to a kiteboard twin tip and we couldn't get it off with pliers and a big straight blade screwdriver.

You can use the flat or curved mounts (black smaller ones) but you need to prepare the surface properly, removing waxes, grease, oils or fingerprints with alcohol or thinners and press firmly onto a pre-warmed clean dry surface (sunshine is good).
There are products like Easy plug from Surftech which can be a good lanyard anchor point if you use the smaller black mounts. Make sure you use the correct mount, flat for flat surfaces and curved for convexed surfaces (tail not nose).
Floaty back door will be an added insurance policy.
Happy snapping/videoing
DM
PS. Never use a suction cup mount on a surfboard or SUP. They will fail. They are great for cars etc.