I'm not sure either matt. I got asked the same thing. I mean I only do 15miles a day and 1-2 motorway journeys a month, so looking at 6k in total per year. My 197 has 41.5k on the clock. Due to redundancy either in the year i've been putting it off until I start my new job next month and when I get to 45k.
Renault told me the camshaft pulley is rubber mounted and would need replacing but I don't know if I should bother replacing it due to low milieage like your clio and how much it is from Karl as it doesn't come in a normal cambelt and waterpump kit.
I'm going to get my Aux belt and water pump done also at the same time.
I was thinking of taking it to RenTech down in Portsmouth, they quoted my £530 alot cheaper than my local renault dealers at £750 (their recent special offer) or £850 standard price (riduculous price).
Another option I am looking into would be buying waterpump, cambelt, and aux belt kit off Karl (Twingeekeo) and getting my local garage to fit it to reduce the cost.
I'll ask Karl how much the rubber mounted camshaft pulley is.