I like the tape idea. Would sure make things easier for the future. My only comment would be to put the tape on starting at the inner surface and taping outwards to the bar end. The grips would slide on easier and stay even more secure, less chance of ever coming off if the glue did deteriorate.

I got this method from a local bike shop when I went there looking for grip glue. The only down side I have found so far is is that you need to get them where you want them fast. If the glue starts to set before you get it in place you are in trouble. Thats why I use slower setting epoxy. I'm old and slow. :)