Oh and the travel bug idea is OK but in these parts there are FTF hogs who would clear out every cache as soon as the coords were given out and all you’d have done is give 18 bug tags to one or two groups; a better idea may be to release them a bit at a time……
In addition to the FTF hogs, there are the people who grab every TB they come across and hang on to it for months on end, never giving anyone else the joy of discovering one. This is the reason I very rarely release any of my TBs near home. There are too many of these people in my neck of the woods.