You asked what napping bootcamp entails? Well, it first entailed getting in a sleep nanny who was recommended by a colleague. She came in to do one nap with us, but stayed for two given that Junior simply refused to nap for the whole duration of the first one. She gave us various hints tips and tricks to try to get him down, most of which you've heard before, including darkening the room, swaddling him, having a regular schedule, offering a dummy as a nap cue but taking it away before he is completely asleep, picking him up if he gets distressed, patting until he's calm, then putting him down again, etc. She asked us to make sure that almost all his naps for the next week would be at home in a darkened room, and to make an exception only for the late afternoon nap if we had to.
Being me, we've adhered to the plan almost in every detail in an attempt to give it a good try. The only area where I've been a bit lax is in sticking precisely to time. Sometimes I'll go 15 minutes later if he's finally asleep rather than waking him. But other than that we've been very good. And the results have been...mixed. I thought we'd cracked it when on Monday it took only 15 minutes to get him down for his morning nap, and he went down with no fuss at all, just a little grumbling, for the lunchtime nap. But then Tuesday every nap took at least 25 minutes to kick in, and the breakfast one was really screamy as well. Yesterday the morning and lunchtime naps only took 10 minutes each, and the only crying was when I first put him down, he immediately calmed down when I put my hand on him and then just grumbled and then lay quietly while he waited for sleep. But yesterday afternoon he only slept for 10 minutes of the hour's nap time, and this morning took 20 minutes again, although not much of it was crying.
So I dunno. It's been a long week, and unlike the previous not-very-successful napping strategy of putting him in his pram and walking, I've barely left the house. I'm going to give it another 3 days or so and then start to try him in his pram as well as in his room as I'm not prepared to be housebound for the next three months. I like to think this will work eventually but so far I'm not totally convinced.