Thinking of going for a couple of days next week during half term with my 14 year old to the water park in Therme Erding Munich flying from the UK. We will be in the clothed side!

http://www.therme-erding.de/de/10068...8/english.html

HIX looks the closest and reviews not bad. HI looks too far out of the way. Or should I be looking at another hotel that's just a hop away and not a holiday inn that's nice.
Any tips on getting about and getting in to the park for the best price welcome!