We've just come back from a week's camping with our 2 who are close in age to yours (4 months and just 2). We all shared a couple of double SIMs. We two double duvets for me, dp and dd1 to share. Dd2 went on the side (so with me between her and the others). She had a sheepskin to sleep on (on top of the SIM), then went in a fleecey babygro and her normal sleeping bag. She seemed fine.
Sorry, probably done to death but I am stressing a bit about sleeping arrangements for when we go camping (in the UK) in a month or so.
Where do you put your young children down to sleep? We've got a bell tent and if it was just DH and me we sleep under a 13 tog duvet. However, I'm aware that that doesn't go with what's basically co-sleeping with the two babies.Also, DH will probably want a few beers (I'm BFing so not much drinking) but I'm aware that also doesn't fit with cosleeping, especially as the 22 month old will probably sleep between me and DH.