To qualify for such a marriage, both the bride and groom must be U.S. citizens. In addition, either the bride or groom must be a Montana resident or be on active duty with the military. Several legal steps must be satisfied and the fee for a proxy marriage can be hefty. Double proxy marriages are recognized by all states except Iowa.
Single proxy marriages can be performed in California, Texas, and Colorado, usually for active duty military personnnel. Colorado law, however, also allows for proxy marriages for those who are incarcerated. So, if you are in the military and really want to get married, you might consider a proxy marriage. But a proxy honeymoon - I don't think so.