Very tough trekking plan and would need atleast 10 days.
If u want to come back to Naran on day one after Ansoo Lake then u have to start early around 6-7 a.m. from Saif-ul-Muluk so plan your arrival in Naran accordingly.
I think u will need a rest day here coz for next 3 days u will be on trek.
It will be snow bound trek for Nuri Top and then to Saral Lake through the pass. And again if u r able to reach Saral Lake then Saral Pass will also be snow covered on way to Dudipat Sar Lake. If u r properly equipped and have experience of trekking on hard snow then only attempt it.
You need 2 days to reach Dudipat Sar from Nuri Top if u use Saral Lake route. Then 3rd day will be consumed to go back to Besal and u will only be able to reach Chilas by day end so night stay there.
You can camp at Beyal but facilities are much better at Fairy Meadows.