As Joe OE5JFE said to you, most of EA summints (including EA9) have trig pillars. It’s easy to install a fish rod with velcro band and deploy an antenna. You can see the deployment of my recently activation Reporting my first activation! I used a DIY 40m band EFHW wire reel antenna, a fish rod of 9 meters lenght and my hiking pole to hold the reel.
You can check if the summit has a trig pillar in this web page, Canary Islands included. Each trig pillar has a sheet of data from official service of the goverment with useful info.
