Just got back from a boat trip in the Mentawais. I took 2 short boards and a 7 ft SUP.
I rode my short boards 90% of the time. All the main breaks were fully loaded with proners and most reef set ups didn't allow an exit into a channel with a non duck diving vessel (i.e SUP). I had the only SUP on board which didn't help in choosing a wave suitable.
If I was to do the Ment's again I would travel with a like minded SUP crew on a boat or pick a land camp with a SUP friendly wave in the vicinity