I'm wondering how necessary it will be to carry bug spray and/or a bug net for my head? I hate to add any more weight to my pack with something that may use very infrequently, if at all. However, I would hate to lose my marbles on such a beautiful trail because of obnoxious insects. Typically, I find that bug spray comes off very quickly from sweating, and isn't worth carrying. Coming from the east coast, I really don't know what to expect in the Sierras... advice?