Betty, do you remember what park(s) you visited?
Sheri, most of the itineraries are for longer..hard to find the shorter ones. Add on 4 days pre or post for the safari part. You may need more like 2 1/2 weeks vacation. Here is an example of one 2005 Silverseas that includes Seychelles: (not sure why that didn't copy and paste as it appeared on the Silverseas web site.)
Isles of the Indian Ocean
Mahe to Port Louis Voyage 2531
11 Days | Silver Wind
November 2005 Arrive Depart
29
T
Join Silver Wind
Mahe, Seychelles
30
W
Mahe, Seychelles 6:30am
La Digue, Seychelles 9:30am 6pm
December 2005 Arrive Depart
1
Th
Desroches, Seychelles 8am 4pm
2
F
At Sea
3
S
Mayotte, French Comores 9am 5pm
4
Su
Nosy Be / Nosy Komba, Madagascar 8am 6pm
5
M
At Sea
6
T
Toamasina, Madagascar 8am 4pm
7
W
Pointe des Galettes, Reunion Island 5pm
8
Th
Pointe des Galettes, Reunion Island 6pm
9
F
Port Louis, Mauritius 8am
10
S
Port Louis, Mauritius
Disembark Silver Wind