we went camping with our dd for the first time when she was 4 months old approx. it was actually really easy, and we were even canoeing and portaging to our campsite. the most important thing is a good, supportive carrier like a mei tai or buckle carrier. i was able to strap her on me and then carry our bags, canoe and equipment, set up the campsite, etc. to canoe, we put her in a infant life jacket (she wasn't a fan of the motion, actually, but it wasn't a very long trip).
for sleeping, we had her in between my dh and i on a little nest of blankets. i brought her into the sleeping bag with me to nurse and for the rest of the night. sleeping was really pretty easy though... she seemed to sleep really well with the fresh air.
the biggest concern with a baby that young i think is sun exposure and bugs. she was too little for me to want to put bug spray or sunscreen of any sort on her, but staying out of the sun often means more bugs... it was a bit of an issue, but easily solved if you're careful about when and where you camp.
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