Your Gearness, I planning to drive cross-country this summer, hiking and camping wherever the road takes me. For the driving portion, I was thinking of investing in a GPS system to help with the "figuring-out-where-the-heck-I-am" moments. Do you have any advice as to the value of GPS for this? (I will not need it for hiking, using the old-fashioned technique of map, compass, and trail blazes) Realistically, I'd like to stay under $300, but will go higher for an exceptional device—one that does the navigating, driving, AND laundry. Charles New York City, New York

I have an opportunity to buy a Tempest 23 tent from The North Face (retail $675) for $400. It is brand new and it looks bombproof. I have asked all over and searched the net for info about this tent and have come up empty. I heading to Mount Shasta in June and would like a good mountaineering tent. On the other hand, I also need to upgrade my old duct-taped, three-season tent. I not sure what to do, buy this single-wall tent and buy a good three-season, or look into a convertible tent. I don't want to miss out on a good deal. Brian Holt Detroit, Michigan

I moving to southeast Alaska this month, and I need a relatively inexpensive, waterproof, and wind-resistant winter jacket. I need something that will keep me warm for extended periods in cold, rainy conditions. Should I buy a heavy-duty rainjacket and wear it over a Polartec fleece, or buy more of a skier's jacket? Mallory Haubstadt, Indiana

Dr. Phil Maffetone February 15, 1996 I’m always hungry. How can I stop feeling hungry? I’d like to know more about this 40-30-30 diet How does the 40-30-30 diet affect one’s lipid profile? Should food and fluid intake during competition be 40-30-30 as well?…

I'm an endurance athlete. How often should I lift weights? Jes Cunnings Austin, TX

As a beginner skier living just one hour from Mount Hood, I'm trying to decide whether I should buy or just rent skis when I go; if I do buy, what equipment won't zero out my bank account? John Portland, Oregon

Have I got an expensive proposition! I'm planning a trip to Italy and thinking it might be the perfect time to buy a new road bike straight from the factory, say Pinarello, De Rosa, or Colnago. Are there any advantages to doing this, such as incredible savings, or seeing the bike in progress and test riding it in the mountains? Are there drawbacks, such as duties, taxes, exchange rates, warranties and language that would make this way more trouble than it's worth? Thanks for your wisdom! Bob Foster St. Louis, Missouri

I'm 42 years old and need to get back into regular exercise since a lower back problem curtailed my jogging career. I was thinking about biking the five miles to my workplace, as well as maybe some longer weekend rides over hard-dirt trails. What should I be riding, and with the back problem, should I sit more upright than hunched over? Mark Bethesda, Maryland

I recently started taking my dog with me while backpacking, and he loves it. But, should I worry about him drinking from lakes or stres? Should I filter his water for him? Kevin Mississauga, Ontario

I have been running four to six miles four days a week and my knee has started to hurt. I tried switching shoes, running on grass, etc. Icing seems to help a lot, but I don't know how long I should have it on there. Is half an hour too long to ice my knee? Cody Carik Bismarck, ND