removal of the SAS and evap is not going to directly cause any significant system failures and should some thing related to these modifications fail, the engine will still run, just will have EFI fault codes. I would say that it is worth the effort and risk to make these changes.
Adding in the removal/replacement of the OEM airbox with a foam filter assembly is adding risk, but not significant, provided the work can be performed well prior to the planned trip to perform some testing.
Personally.... for right or wrong.. and it has bit me sometimes.... I am working on my bike up to the night prior to leaving on a trip.