Hasan's idea is a good one. WB4APR has been preaching this from the Naval Academy for some time ... in fact it is a US Navy design from the dawn of the Space Age. Check out the link below. Note the slight, fixed elevation of the Yagis on the mast. The Navy didn't take any chances with critters eating cables either ... the operator simply grabbed the steering wheel that you see in between the two R-390A's inside the hut and swung the antennas around armstrong style.
de KM1P Joe