I've used various handheld radios on GMRS, FRS, MURS frequencies. Unless you are at the top of a hill looking directly downward to the other phone with nothing else in the way for clear line of site, don't expect more than 1/2 mile. figure 1/4 mile in dense trees, buildings etc.
We use some high end rugged models for off road motorcycle riding along with push to talk headsets in the helmets. work great, but only for 1/4 to 1/2 mile. Yes, on occasion in flat land we have reached further than that, but don't expect it as anything routine.
Nice thing about the high end units is the ability to use tone controlled squelch so you don't have bursts of noise.
And we use them constantly when parking the trailer in campgrounds since many of our campgrounds are out of cell service range.
Or between vehicles when caravaning to campgrounds.
FCC has also cracked down on a bunch of the units that don't meet type qualification and/or were tuneable or able to work on frequencies outside the type spec's.
2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!