who is your dd going with?as a group, I mean - are they very religious?
I am a Catholic, but am not practising. dh is a bit more religious than me, but neither of us get to church more than 4/5 times a year, i would guess.
we went with a group of friends (they organise a visit every year, we are hoping to go again next year). the town is, obviously, a religious town, and there is quite often a service being broadcast over speakers, etc (or maybe that's the times we have been in the past - we go on the military weekend - great fun, lots to drink, lots of men in uniform ), but a lot of the experience will depend on who she is going with.
Our group, for eg, have a quick service each day (20 mins, max) and the rest of the time is spent soaking up some sun, running around town trying to find the tackiest souvenir for the competition (I won one year, with a replica of Bernadette's vision set in perspex - already sounding great, i know, but add in garish colours (natch), and the last flourish - the whole thing is in the shape of a teapot?! Still sits on my desk now!)
The town is nice, everybody is helpful, as the majority of people are there for similar reasons, so there is always an extra pair of hands to help out, if necessary, with wheelchairs etc (and I would say it will be necessary - it is very hilly!). The surrounding countryside is beautiful too, if they get day trip organised etc.
I have never felt as thought the religion is pushed in your face at all - there is a church-y type feel, but kind of like a Christmas/Easter/major family celebration service rather than an ultra serious feel.
We are hoping to take dd1 next year - not for any miracle cure, but it is because of there that she is here, iyswim, sncedh & I met there (the friend who organises our group tour is also her godmother, so will be a real family feel).
Everyone is totally accepting of just about anything. I would not recommend taking the waters - my uncle has done the swim in the holy waters, and he says it's not a great experience, but I supose that depends on how much you want to/need to.
Can't think of anything else rigt now, but if you have any questions, do ask.