I'm going to guess that you "heard" the land that you could hunt on was about 90 acres and to your best recollection it is a "funny shaped" square, roughly 3/8th mile (1,980 feet) per side which works out to be exactly 90 acres. So the furthest you need to communicate is diagonally from opposing corners of the square or about 2,800 feet (0.53 miles).
If the radios are in a valley 1/2 mile apart with 1 or more 30 foot AAT (Above Average Terrain) hills in between, using a MURS HT, I would venture to say that you have a 100% probability of not hearing each other. Given the exact opposite scenario, the two MURS HTs are on 30 foot hills, 1/2 mile apart, with a valley in between, you would have a decent chance of hearing each other. How clear it would be depends on receiver sensitivity, amount of foliage the signal passes through, path loss, etc. Unfortunately, being retired now, I no longer have the tools needed to make those calculations.
Bottom line? Regardless of the radio service, if you are talking handheld HTs at head height that need to transmit/receive through heavy foliage as you described earlier over a path approaching 1/2 mile (worst case given the numbers we are looking at here), even if those 30 foot hills did not exist, you are asking a lot for "good" communications from low power HTs. I would suggest picking up a pair of MURS HTs and do some field testing. Get a better feel for what you are up against. Who knows, you may even be pleasantly surprised.