Playing outdoors

Hey guys,I had a question. I recently have been playing outside without alot of open space recently,and my sound has been a bit,Oh I dont know spread out. Like not as loud as inside. I tried cranking the amp to 10,and adding generous reverb,but that creates a lil buzz and feedback. Is there anyway that you guys could suggest some ways to make my sound present itself a bit better in an open space. I have 4x12 100watt crate halfstack.
Thanks for any and all advice.

Simple. Crank your amp to 11.