今天下午和晚上的新进展：
一定要带足防蚊子的用品。 LvtoTravel 给介绍了 Avon's SkinSoSoft products，说是 as effective as DEET, but does not have the smell of DEET.
Peach1 提醒在 BWCA 可能会见到北极光！！！太兴奋了。明尼苏达州有个城市就叫 Aurora，肯定是跟极光有关的。找到一个Boundary Waters Aurora 的网站，贴有照片。下一步要了解最佳观看时间，phase of the moon，以及拍摄技巧。
见到朋友 Matt，忽然想到找他教我钓鱼。他说他们家在北密西根有个林间小屋（cabin），请我去玩，到时可以钓鱼。听说要拿许可证才能钓鱼。不知道 BWCA 从哪里拿钓鱼许可（我知道是需要的）。
General Insect Repellents Information
Insect repellents are designed to deter insects from stinging and biting. In order for a insect repellent to be effective it should provide greater than 95% protection for at least 30 minutes after application when applied at a rate of 1.0 ml per 600 cm2 of skin (approximate skin area of an average human forearm).
Insect repellents fall into two categories: DEET-based or non-DEET-based (DEET-free) essential plant oils. There are concerns about the potential dangerous side effects of DEET-based products, but these products are very effective and are safe when used properly. Insect repellents containing DEET can provide full protection from 2-8 hours, depending on concentration of DEET. A 7% DEET formulation (e.g. OFF Skintastik) will provide about 2 hours of protection. A 30% DEET formulation (e.g. Deep Woods OFF) will provide 4-6 hours of protection. A 75% DEET formulation will provide 6-8 hours of protection. Children should only use products with less than 10% DEET to avoid possible overexposure and harmful side effects. DEET free essential plant oil repellents are also effective in preventing bites and stings.
The effectiveness of both DEET-based and DEET-free repellents depends on how much a person perspires and his level of physical activity. Swimming and other water activities will also affect repellent effectiveness. Use the repellent as indicated on the product label for safe and effective use.
