A long time ago I read some weird news story about how to get paid doing odd stuff..... umm not perverted for once. Anyway they would pay people to drive across the country in RV's to a customer destination. So sometimes the people would also haul cargo to get a slight bonus. It might be worth looking into.
I know you can ship your own guns to yourself w/o involving an FFL . Semicom£monly done by persons going to big matches , and people driving to Aalaska who don't wish to deal w/ Canada. Have to do a search about having an authorized Agent to take them to the UPS terminal in MT on your behalf.
If they already belong to you , and none are prohibited *Assult Pistols* , then you needen't involve State of Md.