> Any suggestions for a 2m antenna?
Try a moxon, here’s a lightweight one I made, you can see in the pic from Callow Hill how high it was up the fishing pole. Although last time I used it, being rather windy, it needed to be lower, otherwise the pole just swung about rather alarmingly 
I’ve also used an ELK antenna, although it’s a bit of a faff to ‘build’, and being rather weighty, it can only go so high up the pole. I did modify the mount on mine, with the addition of a 15mm pipe clip (similar to the ones I used on the moxon) so that it’s fairly easy to swing it from vertical to horizontal, but again, the pole does have to be lowered to do so.
I’d also agree with not trying on a ‘sporty’ day, I think I tried on the day that Bradley Wiggins won the Tour de France, and failed to qualify the hill on that day as well 