I have a couple repeaters in the Coachella Valley, and recently got into linking... I went with GMRS Live instead of MyGMRS for this reason, there appears to be a stronger presence in So Cal on GMRS Live... I got my first node up last weekend and am researching putting together a proper SouthWest hub via GMRS Live... Another strong point for GMRS Live over MyGMRS is with GMRS Live, you can run a node with just a hopspot. Last I looked you had to have a proper repeater for MyGMRS nodes.
Chris
cvgmrs.com