HSRP is not really designed to be used in an active active configuration. The true purpose of the protocol is to provide redundancy not load balancing. Multiple HSRP groups do provide load balancing but to be honest its quite crude. I would look at GLBP instead which is very similar in configuration and can be used in an active active configuration to provide true load balancing.
Be aware though that by configuring GLBP or multiple HSRP groups that this will only deal with traffic from your network out into the cloud and not the other way. You will also need work with your service provider to ensure that they load balance using both circuits back to you. Different service providers use different techniques so you will need to speak to them about that.