Bike Bag Suggestions

Hi guys,
I'm going on my first 'cycling holiday', it's only 4 days (Staying in Hotels) so my luggage will be minimal, literally flip flops, underwear, few t shirts and a little bike kit.
This could all easily fit into a backpack but I'd rather not as that would just be a nasty sweaty mess and annoying, could anyone please link a bag that would work? I'm unsure if a 'rack' would be too much? I hear there's something that can come off the seat post or rails?
Thank you.
Would something like this work?
http://www.wiggle.co.uk/carradice-sqr-s ... r-bracket/
I'm going on my first 'cycling holiday', it's only 4 days (Staying in Hotels) so my luggage will be minimal, literally flip flops, underwear, few t shirts and a little bike kit.
This could all easily fit into a backpack but I'd rather not as that would just be a nasty sweaty mess and annoying, could anyone please link a bag that would work? I'm unsure if a 'rack' would be too much? I hear there's something that can come off the seat post or rails?
Thank you.
Would something like this work?
http://www.wiggle.co.uk/carradice-sqr-s ... r-bracket/
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Posts
http://www.sjscycles.co.uk/carradice-ca ... r-prod606/
Like this? http://www.wiggle.co.uk/carradice-sqr-s ... ft-system/
As support I use http://www.wiggle.co.uk/carradice-bagma ... bag-mount/ - though mine is a year or so old and doesn't have the two struts attaching to the seat stays - presumably these are to stop the thing moving about, though with the low weight I carry this hasn't been a problem anyway. The bag attached to the mount and clips on and off in a couple of seconds.
Completely agree about the backpack - I did a four day tour in South West France last year with two mates one of whom used a back pack despite our advice. On the last morning he finally admitted that he was in severe pain from the sweaty rubbing and general unsuitability of the thing!!
Like this? http://www.wiggle.co.uk/carradice-sqr-s ... ft-system/
Yes its what I use