Hello david,
I saw that your questions were unanswered for quite some time so here what i can tell you beau rivage is a good choice but its a little formal * for the working ethics , and its quite rare to have a hotel thats not that formal*
Furthermore April is excellent ( if there is no cyclone) the temperature there will be around 28 to 30 degrees! thats for sure . SO basically talking you are ok with your arrangements . No worry.
i Helped someone getting married in mauritius one day , So my advise is to deal with the hotel papers well . and and dont forget to get the best marriage deals , Tips:: Bring a DV camera ( you will like it) Second tips:: The photographer might take a considerable amount of money * yet the pictures will be good* .
Dont forget Check good deals , like getting cakes etc// so many goodies they will give you .
Congratulations in advance,
Kayssaven@yahoo.com