Just as mark said - set a flat depth to your V-carve. If you are using solid wood - you usually don't want your carving too deep anyway or it can warp on you.
Also - if it drastically increases your cut time, use the large area clearance tool. It will require a bit change - but you will find it cuts much faster than V-bit alone.
However, in my personal experience, the more you can get away with a normal V-bit the better. A larger 90 degree bit may be the best option.