Got that right on the camera hold. When I was taking photos in Paris and London Museums I was not allowed to use flash. Also not allowed to use tripods. So now what do you do????
1st Bil is right if there is glass that you can lean your hand on to support your camera on then you go with that. Try to wide off your hand print when done.
2nd Use a tripod, if allowed, some Museums don't allow tripods. Now what? Well I "have" a "bad back" and use a "walking stick", really a Bogen mono pod camera holder do set my camera on. Also been known to see it in the field to rest my rifles on, also can use it as a walking stick. Bogen makes a nice line of them. Could also use one of those walking sticks from walmart that they sell for around $10.00.
3rd Did not think that you would have those problems and did not bring anything. Best of luck and like shooting a weapon, take a breath 1/2 out then hold and try to take several pictures... Good Luck.
In my case on the above photo. Low light and then an area between my self and the glass, so I was several feet away from the glass that I was trying to shoot through. Also try to angle your camera so that the flash is not straight on.
Still hardest photos to take ---- Gymnastics ------ Always low light, Fast action, CAN'T use flash.... Flash risk getting punched out by someone.
Any rate I'll try looking for more photo's for this post.