I am 5'10 and heavy set. Was considering...
I am 5'10 and heavy set. Was considering purchasing the long version of this bag for a little more wiggle room.
Good or bad idea?
62" is pretty good for a lightweight bag shoulder measurement. If you get the long for the extra 2", you also gain room in the footbox to dry gear or keep it warm - boot liners, water bottles, socks, etc.
Your alternative is to look for bag with larger shoulder and hip measurements.
Don't forget that the extra space at the feet can cause cold air pockets near your feet, I would see if there is a wide option available though if you say you are heavy set.