Off the Beaten Path
Join Date: Apr 2002
Location: delta, bc, Canada.
Interest: This and That
I have been a professional guide for over 25 years. It is always difficult to pass along recommendations when you don't know much about the people asking for suggestions.
I have led hikes on the Chilkoot Trail. Although the hike is moderate for the most part, there are challenging sections offered by landscape and weather. Hiking over the pass can be exhausting, cold, and wet. The alpine area is quite exposed and bad weather can make it a trial. I pass this along to highlight the importance of proper equipment, clothing, and shelter, even in July.
You don't say how old or big your son is. A 35 liter bag may be suitable for his physical frame but may create capacity problems for a sleeping bag, pad, clothes, tent, food, toiletries, misc. We recommend to our clients a minimum 72 liter pack (assuming their back can accept this size).
I always carry a down bag for compression and warmth considerations. Take the proper care and you can assure that your bag will not get wet (a proper tent with fly that is ideal for the area you are hiking - a compression stuff sack for your bag that is double garbage bagged [inside and outside sheltering of stuff sack])
A number of good suggestions for sleeping bags were made by readers. I always preferred a barrel bag for the options it gave me. It acts in many respects like a mummy bag while allowing you to unzip it and use it as a blanket in warmer weather. A consideration that many ignore is one's comfort with the lack of movement within a mummy bag. Can be very claustrophobic. Know where you fall on this scale as you can go crazy if you are so confined.
Finally, carry an air filled sleeping pad.
Final piece of advice - when purchasing items for your hike, don't go cheap. You get what you pay for.