I'd activate toll roads.
This is why: you guys come from The Netherlands? By car? What's your route? Through Germany, I guess. Germany is toll free. So You'd just need a toll badge for Austria. Those are available for 10days (€8.30), 2months (€24.20) and 1year (€80.60). I absolutely recommend to buy one, because its expensive if they'd check (which happens not that rarely!). Check out www.asfinag.at for further information.
And within that badge almost all freeways are included.
--> Coming from NL to AT (I think kufstein will be your border) the freeways are included into that badge. Going from fügen to Salzburg is the same.
So don't avoid toll roads! Otherwise you'd leave the freeway in kufstein and drive the majors up to the zillertal. That would be very annoying! (Many cities and speed limits.
And as I've written before... In the zillertal shouldn't be any extra toll roads opened at your arriving time.
I'll give you a tip: don't fuel up your car on the highway petrol stations! Those are too expensive. I think even the German highway gas stations are much cheaper.
Diesel isn't that cheap here anymore (it's around €1,45 at the moment, unlead 95 (which is called 'super' here) is 2ct more. )
Any other questions? Let them come. I'll try to answer them
Yours,
Eric


