From Tsim Sha Tsui to Victoria peak, Hong Kong

We have decided to take ferry from tst to central.. then board bus 15 to peak.. and while returning, we will get down in stop no 28 that is pedder street as it is right outside the central mtr... and then to tst.. this is on Sunday night..
Is our plan ok??
I hv 2 doubts --
1. I read that we need to take bus 15 from central pier 5.. after we got down from ferry,how long we hv to walk to central pier 5 bus stop.. is it easy to find pier 5??
2. Since we hv chosen Sunday night,(say around 6 or 7pm) will it be too crowded? - both in ferry and peak??