The updated Thermarest XLite comes with a pump bag which avoids having to blow in the mattress to inflate it.   This got mixed reviews but a friend of mine had no trouble using it with her new regular wide size XLite.  That requires quite a bit more puff than the regular size which I have.  It is still some work to inflate the mattress and it takes a bit of practice but the bag is lighter and more reliable than carrying an electric pump.  Something to consider anyway