Hi Hob , if it's any help , not obvious ,and you don't mind the hassle , one technique for for searching in thick forestry is to don over troosers and hooded top preferably gore tex (it's warm work whatever the season ),then crawl under the lower branches .It's worthwhile if the panel is found and it keeps the pine needles from the back of yer neck etc . GPS should continue to work too . Good luck if you go .