A query about bedding

So I've started my annual preparation for Pennsic (making my list, checking it twice, etc.) and I'm wondering if anyone out there has a clever idea about bedding.

See, here's the thing.  I really don't like sleeping on an air mattress.  They squeak, they bounce, they deflate unexepectedly.  However, they get a high score in terms of compression and packability.  

So... does anyone out there have a clever idea for alternative bedding?  I've been wondering about foam or something along those lines.   Ideally it would be something that either (A) could squish to fit in an already fairly full car, or (B) could be easily obtained in Pennsylvania once we get there (and possibly even left in Pennsylvania in the trailer that our campsite rents there, although that would require an additional degree of heat-, humidity-, and cold-tolerance, since it would be living in an un-climate-controlled trailer for a year.)

A query about bedding

So I've started my annual preparation for Pennsic (making my list, checking it twice, etc.) and I'm wondering if anyone out there has a clever idea about bedding.

See, here's the thing.  I really don't like sleeping on an air mattress.  They squeak, they bounce, they deflate unexepectedly.  However, they get a high score in terms of compression and packability.  

So... does anyone out there have a clever idea for alternative bedding?  I've been wondering about foam or something along those lines.   Ideally it would be something that either (A) could squish to fit in an already fairly full car, or (B) could be easily obtained in Pennsylvania once we get there (and possibly even left in Pennsylvania in the trailer that our campsite rents there, although that would require an additional degree of heat-, humidity-, and cold-tolerance, since it would be living in an un-climate-controlled trailer for a year.)