I just passed this information along to a new 176T owner, but figured that I ought to share in the forum...

I know that the different models that have bunk beds have different size bunks, but the 176/176T models...it is handy to know that:

1.  each bunk is exactly 1/2 the size of a queen mattress, so you can get a queen mattress topper and cut it in half to enhance the sleep experience.

2.  That mattress size is also the same as roll-a-way cots, portable cots, etc.  You can actually find sheet sets for that size, probably easier now during summer camp season.  Search for "camping cot" rather than just cot, because in the UK they use that term for a baby crib.  Example:  http://www.campstuff4less.com/Jersey-Knit-Cot-Sheet-Sets/products/49/ (I don't know anything about that website, just giving an example of the size).

3.  Conveniently, it is also a common size for massage tables, so you can get fitted sheets, and sometimes sheet sets, by searching on that. 

4.  If you’re handy with sewing, you can actually make sheets using regular 44/45” wide fabric.  You can use this for instructions:  http://offbeathome.com/2012/10/diy-fitted-sheets - http://offbeathome.com/2012/10/diy-fitted-sheets

and this for pillowcases:  http://www.nancysnotions.com/text/pdf/SpeedyTrimmedPillowcase.pdf - http://www.nancysnotions.com/text/pdf/SpeedyTrimmedPillowcase.pdf

Hope this helps! Happy camping!