Not everyone is going to the Mega event, so I wouldn't let that put you off! Being a bit of a trigpoint hunter myself (albeit a newbie) I can empathise with your excitement at conquering them all.
.......
..... Good luck with your mission, and fingers crossed for fine weather.
The following weekend there is an event in
The Wye Valley (which we are attending). You might find some willing companions there if you could reschedule.
Edited to add: if you can set it as an event you might just tempt a few more along just so they can get a smiley :-)