My dh is a road warrior who accumulates Marriott points, so we have only stayed there. I like the Little Lake Bryan location and facilities, no experience with the Sheraton Safari. However, my question is this: have you checked availability for a points stay yet? It doesn't seem like the Marriott sets aside very many rooms for points--we stayed last August on points at the Courtyard, and there was no other choice for the other hotels (normally when travelling with the kids I would have picked Springhill Suites for the free breakfast and larger room). Anyway, good luck making a choice--sounds like a fun trip.