I will be in a situation soon where I will have no access to weights for 2 weeks!
How should I exercise? Should I still do sessions of BW exercises of pushups, situps, and squats?
How much, and how often?
Any other ideas(besides sitting on my ass)?
Be sure to check out CT’s article on that topic.
Also, I have yet to find an athlete or bodybuilder that doesn’t find single leg squats off of a chair difficult.
As DB mentioned above, single leg squats off a chair, turn two chairs back to back and use the backs to do dips, find a door or door frame to do chins, do some ab stuff, handstand pushups, door handle towel rows, pushups…
Deadlift the bed. If you’re home, the bed will rise as normal, if you’re in a hotel, it may be stuck to the floor, in which case, you’re either stuck with an isometric move, or nothing.
You’ll need to use a reverse grip, palms facing out. Keep your arms straight, and feet in conventional (as opposed to sumo) stance. You can also face away from the bed, and do a Bed Hack Squat. Enjoy. 
As an aside, I wouldn’t completely stress if you go a week without lifting (2 is pushing it, though). Odds are you’re due for a break, and when you return to normal, you’ll be that much more revved up.
In addition to the above, I’d recommend Coach Sommer’s gymnastic movements. If you have a sturdy door frame or a bar, you can work on levers. The floor gives you tuck planches and handstand pushups as options. Also work on press to handstand.
You can also use the two chairs back to back for L-sits.