1/ can you put any spare resource tokens on a quest, or can you only put one per turn on while a unit quests?

2/ i have a warpstone location that makes all units come in tapped. can this be played in an enemy location? or is it just a card thats cheap to use (well free) that adds a card you can draw per turn, but with a fairly severe downside?

thank you

1. As per the conditions of the quest, usually (exactly) one per turn if a unit is questing there. Note that these resource tokens, and others you place on cards, come out of the general supply, not your personal pool for that round.

2. The only cards you can currently play into your opponent's zones are attachments (that aren't specifically limited to your own cards). So Warpstone Excavation is indeed just a cheap card with a downside.