we had our fist overnighter with summer when she was 3 weeks old. She slept in one of those samsonite popup travel cot things, but we later went on to use a moses basket as you could move this with her in it. nothing worse than getting them to sleep then them waking up as you try to slide to back of the van to put them down! he he. She was fine and wrapped in quite a few blankets. Bear in mind though it was towards the end of may so a little warmer that at the moment.
I made sure I didn't have loads of covers on, so I would know if was really cold. She was still waking every 4 hours at that point though for her feeds so it was easy to keep an eye on her temperature wise. Nice and snug in a moses basket with the blankets. put little socks on her hands too as they didn't seem to come off like the baby mits we had...
Once night in spetember it got really cold, but I just put the cooker on for a bit to warm the van up.
If it were me, i'd wait and see what the weather forecast is gonna be like... In truth you'll probably not sleep brilliantly the first few times you camp with your littel one as you'll be half asleep and checking that they're fine.... I know i did!
