Glad you managed OK, i like the giving them no option method - making sure there is no way they can get between my legs to disappear, so they have no option other than to go forward into the carrier. Most of the people who adopt from me let me put them in, so they dont associate it with them, so I do have to do it quite a lot, and it works with about 99%, very rare it doesn't. I find the front openers easier to work with, especially if you cant touch the cat much.
Glad things didn't go too bad, but he might be easier to clip his claws at home, as you can wait till they are relaxed and sleepy and just do a couple at a time - mind you, that is something that I rarely loose with too, although not tried with the latest fosters.