chinches on "Crib monitor"

Does anyone have an advice for protecting/monitoring a crib with legs like on this one:

http://www.amazon.com/gp/product/B0010TODHG?psc=1&redirect=true&ref_=oh_aui_detailpage_o04_s00

Would ClimbUps like these be the best option, or has anyone fashioned any DIY monitors for large footed furniture?

http://www.amazon.com/Climbup-Insect-Interceptor-Bed-Trap/dp/B004PKKP1K/ref=pd_sim_86_1?ie=UTF8&refRID=0R6BASXVERCC1AQZFF8H&dpID=31NakpFxfjL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_

Any other measures I can take?