Releasable cable ties are simple to install and release so they can be used over and over again.
21-10816 - 14.5" x 4.5mm Weather Resistant Cable Ties - Black - 100 per Pack
These high quality, durable cable ties were specifically manufactured for use in outdoor environments. The provide excellent UV resistance and are permanent locking.
21-10818 - 14.5" x 7.5mm Weather Resistant Cable Ties - Black - 100 per Pack
21-10826 - 5 3/4" x 1/3" Releasable Cable Ties - Natural - 100 per Pack
I have used MCM for many years and would give high recommendation for getting the job done right.