The quest represents your life purpose - what you came here to become. This is most likely the reason that this symbol appears in many of your dreams - it is your Higher Self reminding you.
A city is often a symbol for the mind, I.e your thoughts. This is especially true for capital cities because the Latin 'capita' means head. However, you are in an enemy city which suggests that there is some negativity (a dispute?) regarding your state of mind, or thoughts. The location will often give us the overall subject matter and we see that this is confirmed with references to information and technology - all rational symbols to do with the mind. The dream may also be saying that your rational mind does not necessarily have your best interests at heart (enemy city).
We also see a lot of hiding going on (cloaking, clandestine, hidden sources). We are everything in a dream, so do you feel that you need to hide in some respect? Do you show your true self to the world?
The hotel brings you back to your birth (hotels have a reception, i.e. your reception at birth) so we would expect to see some spiritual abilities referenced in the dream which you brought with you to this incarnation. We do... You are a spiritual teacher/leader (someone who empowers others to help them grow in awareness) indicated by the groups with a common purpose, and I suspect that you are telepathic (communication using special frequencies), but we would need further symbols to confirm that. However, the dream is showing that you are keeping these abilities hidden, perhaps by being super-rational (always thinking).
Do any of these ideas resonate at all?