We went to Cappadocia from Side a few years ago for £38! That was for 3 days and 2 nights HB including entrance fees into several place en route.We were there 2 years ago and was surprised to see the trip being advertised for the same price opposite the hotel we were staying,the Hemera.
Its the most amazing place I have ever been to and if you Google there is loads of information and pictures.
The holiday Rep, was charging £98 for just 1 night,2 days.
There is lots of local companies around the resort and if you book ask if it is an English tour.The one we were one had German,Dutch and English guides and we all had to listen in 3 languages!
We visited Pammukkale from Kusadasi and I dont know whether it is available from Side as its a long way away.
I would love go back to Cappadocia but wouldnt bother with Pammukkale.

We went to Pammukkale and booked up through Hemera Hotel in Side. This was about 10yrs ago so not sure on the price. Was a VERY LONG TRIP 2 days and one night away, and not really worth it, although Cleopatra's Pool was refreshing when we got there. Going back to Side this year in May and staying at AI Alba Resort Hotel, really looking forward to it!

Thanks for the replies guys, I didnt realise they were long trips so will give them a miss!

It does take you away from your hotel for a few days.We chose Side so we could go to Cappadocia and it was May 1994 when we went and I would love to go back.
When we were in Side 2 years ago we didnt go because as we were coming into land the snow was still on the mountains that you have to go over to get there!