Well, I have the same question, what do other cosleeping parents do for naps? I guess the answer is whatever works. My baby (almost 5 months) sleeps with us at night, and I haven't gotten a crib... it seems so wasteful to get a crib just for naps... which only last about 15 minutes unless I hold him/wear him (and this guy is pushing if not exceeding 20lbs already so I just get tired after a while) or take him out on walks in the stroller. I am a full-time student so I really NEED those naps to last long enough for me to get some work done.
Our Dr. is totally supportive of bedsharing but warns me that the baby will be "flipping over and all over the place" any day now so not to ever leave him on the bed alone, and she has me a little nervous even after reading all these posts about how your babies never fell out of bed. Well, I have put pillows on either side to take bathroom breaks, etc but was wondering if maybe I should look into cylindrical bolster pillows or something that I could use he ever actually starts napping. I am also thinking about trying a mat on the floor that we can roll up or store under our bed when we aren't using it. A baby can't fall off the floor, right? Mommas out there- have either of these things worked for you?
We're both grad students, so taste and parenting style aside, the budget is super limited and we don't want to buy anything we can avoid. FYI for the future mom- we haven't had a baby seat, baby swing, bouncer, exersaucer, or any of that, and the little guy is very calm and happy, growing like blazes and doing all his developmental stuff, and I really haven't missed it, and he's so darn big he's have grown out of a lot of it so fast. Baby is happy to play on the floor, and I use various (cheap, simple) slings and wraps all the time.