I've searched and found a lot of good advice on sleeping bags here, but not to my specific question.
I'm planning on doing the transam E to W in June and July. What temperature sleeping bag would you recommend? I know the east coast pretty well, and I'd be fine with a 40 or even 50 deg bag, but I'm not sure about going through the rockies in July, and what altitudes or cold weather I might hit? Will I need more than a 40 or 50 deg bag?
Related follow up question : Should I bring a light insulated jacket? Or would I be fine with a wool base layer, T, and maybe my rain jacket on a cool evening? I want to go as light as possible, and it will be mid summer, but I just don't know the weather there. Thanks.