Fiji, October....on my own

Hi, I've booked to go to Fiji from 23rd-31st October.
Originally this was with my partner but things have now changed. I'm
not so much worried about my destinations being 'coupley' (Barefoot
Island Lodge, Nanuya, Octopus and Beachcomber) but
just wondered if anyone was out there at the same time (staying at
Smuggler's Cove on 23rd) and if anyone could advise how much
cash I will need to take for the 6 days on the islands.
Any other tips/advice also greatly appreciated.
Thank you
Tamara