Start with bass drums playing the same part as snares to get their hands going before adding in the splits (can also be applied to quads if arounds prove challenging).
Make sure everyone stays loose and relaxed and don't "overplay", especially on the individual strokes after a grouping - ie. Careful not to pound the left in R R R L
The bass split in bar 6 is called a "laser". These are hard for an inexperienced bass line so feel free to simplify if required. Same goes for 11, 12 and 13 which have 32nd note lasers.