I was able to catch them both last night, through sucker holes between clouds that were not supposed to be there. Even had the novelty of ice pellets raining down on me while observing...those weren't supposed to be there either. It is a pretty bad night when only three targeted objects are logged and two are asteroids. I should have followed my gut about the weather based on what I could see towards the mountains all day, and a thin band of cloud offshore in satellite view in the afternoon that looked like it might arrive that night. My gut forecast was spot on; the models missed by a mile.
I observed Pallas first, identifying it through my 2.3x binos in averted vision through/between thin cloud. It was noticeably dimmer than the 7.1 mag star approximately to the north of it. Switching to the 20" it appeared to have a yellow hue at 278x. I put the seeing as somewhere between 2 and 3/10 Pickering for the 20", poor at about 2 arc seconds, so I couldn't really separate the airy disk from the diffraction rings of stars. I did observe some subtle but consistent differences though vs. 8th mag comparison stars. I used 357x at times which indicated Pallas was borderline non-stellar, primarily because it appeared more stable than the shattered diffraction pattern of the 8th mag stars, and there was a smoothing effect to the brighter central portion of the pattern that was absent for stars. My calculations show a diameter of ~0.39 arc seconds, so I would need some decent seeing to resolve it.
I did not try the 2.3x binos for Iris. It took me some time to identify the correct pattern in my 80mm finder at 16.7x. Switching to the 20" I found it more difficult to distinguish Iris as being non-stellar than Pallas was. The effect was more suspected than confirmed. Iris appeared somewhat more stable than 9th mag stars, but the difference was not large and not really sufficient to identify it as an asteroid vs. distant star. Being lower in the sky I only used 278x for it. I had the impression that Iris appeared slightly wider than similar magnitude stars, but this was only suspected. Doing some calculations now at home, I find the apparent diameter should be about 0.17 arc seconds. [Stellarium is predicting 0.4" and is way off for some reason...not sure why as I cannot find the elements for Iris in the .ini files, I don't know where it is pulling its data from.]