I hope you are exaggerating about the 10 feet. There are some insects that are hard to approach but most will permit your presence. When approaching, don't allow your shadow to be cast over the insect. They tend to interpret it as a predator coming in for a kill.
I often use a 2x teleconverter with my 100mm macro lens. This allows me to work at a bit more distance from the subject. Sometimes I do this just to be able to approach the insect other times it is to keep my distance from a wasp or such.
With the macro photography, I often just sit myself down in a bunch of flowers or whatever and wait with my tripod, allowing the insects to approach me.
For non-macro photography, I use my Canon 100-400mm zoom lens. This allows some decent close-ups from 6-10 feet away.
Good luck!
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