For diabetics, the benefits of exercise can't be overstated. Intermittent and intense exercise has been shown to improve heart function in type 2 diabetics, and improved cardiac function has wide-ranging benefits for your healgh. Thus, caution and prudence need not dampen your enthusiasm.
If you're taking part in strenuous or rigorous exercise, what do you bring along so that your blood sugar is well-maintained? There are currently many solutions to quick glucose replacement, including a plethora of energy bars, snacks, and gels, some of which are free of added sugar.
Exercise can make you more sensitive to insulin for up to 24 hours, so care is needed when pushing your body during strenuous activities.
When it comes to food and camping, there are threads on various forums where diabetics exchange ideas for meals and snacks that will help you control your blood sugars out in the wilderness. On Trails.com and Backpacker you'll also find articles and posts that are instructive and helpful.
Your registered dietitan is a great resource for hints and ideas for camping foods, as well as ways to manage your diabetes while hiking or doing other outdoor activities.
If you're running a half-marathon, definitely talk to someone who can guide you about how that level of strenuous activity will need to be managed in terms of your diabetes.
If you're going camping in a fully-appointed RV with a refrigerator and kitchen, storing and preparing appropriate foods will be almost just like home.
However, if you're going backpacking into the absolute wilderness, your planning will need to be much more robust and circumspect.
Advice from experts and peers, and appropriate resources found online are all wonderful places to turn for support and information. Know before you go, talk to those in the know, and have safe fun out there, whatever you do!