Step 1: You Want To Blend In
Step 2: If You Don't Blend In Your Just A Sitting Duck
Step 3: Work With Partners
I usually work with my friend when ever I go to play airsoft. I do because if a guy sneaks behind me and I have a bolt action sniper rifle I'm most certainly shot. So work with a partner if you can.
Step 4: Make Sure That Your Gun Is Covered
If not you are now more noticeable.