I wear daily disposable contacts (Focus Dailies by Ciba) for shooting. Costco do them cheaper than most opticians if you buy 90 days worth. I normally wear glasses every day but find for scope use I would be looking through the corner of the spectacle lens where there's a bit more distortion. Also I can use scope enhancers, whereas they're a pain with glasses.
I just put them in first thing and leave them in all day; luckily I don't have any issues with close work (reading sidewheel markings etc) and I'm fine for driving in them.