I have done an 'in ground' version succesfully in the past. basically dig a hole, suspend a piece of heavy clear poly over it, slightly slack, place a small rock on the plastic in the center to create a funnel and place a cup or bowl under the plastic in the hole centered where the rock is.
Condensation forms on the bottom of the plastic runs down the plastic over the cup and drips in.

Hot humid days work the best.

Vodin, you realize that you can just melt the snow for water, eh?