Yep. Forcing the players to NOT do some quests because it may be useful tomorrow but you don't know so you have to check everyday is really good design.
Again, I'm playing a lot more than 5min per day, and I will finish my cache anyway but I'd like to be able to say "i'm doing the kt cache now" and do it.
Not having to check my map every 8/12 hours so I can see if one spawned.