Well, whilst we're discussing my navigational mistakes, I thought I'd say something about the pistes and the piste map and where I got confused - so that anyone planning on going there in the future doesn't make the same mistakes as me!
The gondola in
Madonna di Campiglio that goes up to the highest point in the ski area (Passo Groste) is in 2 sections - Groste 1 Express and Groste 2 Express marked as 45 and 46 on the piste map (it stops but you can stay in it right to the top). The first section ends at the Boch restaurant and when I went up it the first time it didn't continue upwards because of the high avalanche risk. Looking at the piste map I thought we wouldn't be able to get onto piste number 60 and across to Monte Spinale via the Boch Express chairlift - but in fact you can - because it looks uphill on the map (it doesn't have directional arrows on the piste map).
And I thought the
Pinzolo-Campiglio Express actually stopped so you had to get out after the first section, because it does a 45 degree bend - but it doesn't. You can stay in it all the way to the ski area at Pinzolo, although as I said before, it does take 22 minutes to get there!
When you're at the top of Monte Spolverino, in the
Folgarida sector, and you want to get to Madonna di Campigliio, or
Marilleva, you have to go down 7 to where the Solander restaurant is and the gondola comes up from Daolasa, and then turn left (still on piste 7 apparently) ski down a steep bit and at the bottom of it you can either branch left for the chair back to the top of Monte Spolverino and the way back to Folgarida, or go right for the chair to Monte Vigo and Madonna di Campiglio and Marilleva.
And on the way back from Monte Vigo towards Folgarida, you can take either the red 9 or 12 but you always end up back going down the steep bit on blue 7 to where the Folgarida chairlift is on the left and the Madonna one is on the right. So as far as I know you can't get back without going on the small Folgarida chairlift, number 23 on the piste map.
As I said before, piste 66 coming down from Passo Groste has a nasty flat section and ends up in a car park by the Groste gondola (although you can take the chairlift 39 followed by 40 up to Monte Spinale before you get to the car park). We were rather confused about this, because at the bottom the signs disappeared and the piste went upwards so you had to either take your skis off or walk in a herring bone. If you kept straight on at the last bit you ended up in the car park, but other skiers seemed to be turning to the left and walking up a bit of piste that was even steeper but which I discovered afterwards joins the blue 78 by the bridge and avoids the car park.
Going from the Folgarida side to the far side of the valley in Madonna (where Monte Spinale and Passo Groste are), there's a bridge you can ski over. But coming back they have a moving carpet! And I only managed to get from one side to the other over this bridge but there's also a route under the bridge somewhere, because the others found it, and a route between the Groste gondola and the Spinale Express gondola. I didn't want to risk looking for it and end up walking up a hill or something (or going the wrong way and climbing over a bank back onto the piste, like I did at the start of the week!). There are several strange blue pistes through Madonna di Campiglio itself, which I didn't bother investigating because we managed to get where we wanted to without using them.
To ski the last bit home, from the Malghet Aut where the ski schools and restaurants are and where the first gondola takes you to in the morning, you can either bear right and ski down the blue 2, or keep straight on and go down the black 1. The blue got really chopped up at the top by the end of the day and tended to have several casualties on it, but further down it was fine and then it has a turning to the right for those going to Upper Folgarida but you have to keep left for Lower Folgarida. The black wasn't too difficult but it is fairly steep so if you do it without stopping you're likely to get leg-ache!