tikismoke, Martin is right on this, with personal experience. I also decided to drop sugar from rubs when my spouse was diagnosed as type 2 years ago, and then I began to reduce sodium as well in recent years (for her and myself), just as a precautionary measure.
As mentioned, adding other flavors can make a big difference when omitting or reducing something that you have become accustomed to having on your food. I have incorporated dried fruits and red bell peppers into my dry rubs for chicken and pork for a few years now and that has worked quite well in replacing sugars. Yes, dried fruits still have sugars, though they are not simple sugars like refined sugar, so they don't hit the blood-stream as quickly...and, they add so much more depth to the flavor profile, that you can use less and taste more.
Here's an example of one of my more recent experimental rubs that became a big hit here, even with the kids (note: I used Morton's Lite Salt as a sub with this recipe at 1/2 the normal amount for 1/3 the sodium content, and it is good as well):
http://www.smokingmeatforums.com/t/...t-dry-chamber-recipe-q-view-finished-w-review
Don't sweat the transition to low sugar/sodium. There are lot's of alternatives if you just look around a little...if you like the flavor of something, think about what it can do when added to a dish, dry rub or sauce. Even Jalapeno or milder chilies can be added to rubs for a little extra depth of flavor to accommodate for less salt or sugar. I will say though, red bell peppers have been the back-bone of my sugar-free rubs for years now...they add there own sweet back-ground, so I suggest you start with them. The fruits can come later, but the blueberry, cherry and red bell combination is really nice...I've been thinking of adding apple powder to that as well. I would caution using salt alternatives long-term, on a regular basis, as they aren't so great for health, either, however they can help you to get less sodium from the start, un til you slowly change your recipes to remove them (and replace with other ingredients, if needed, to please your taste).
Hang in there...BBQ doesn't need to end when you need to make dietary changes.
I do recommend you look for the YAWYE group (found
HERE), as Pops mentioned...ton's of folks there for different reasons, but with the same goal in mind...getting or staying healthy, and finding ways to cook and eat which support that goal.
Eric