This is probably been my only real concern apart from where to pee (admirably sorted with a Whiz/Shewee plus biodegradable bag for responsible disposal of tissue if it is required). I have been blessed with a non-snoring husband, but have some champion snorers in my family (all of whom are male, and have gone up a few collar sizes in their life).
From the point of view of worried snorers, there is a gumshield-type device available that keeps the lower jaw in a position and is effective in preventing snoring (so, of course, is keeping your weight down, but that, as most of us know, is not always so easy). The few times I have had to sleep around snorers, and for when I stay in Central London, then I have found Q-Zone earplugs to be the best. They are washable silicone and have two different filters for low (snoring) and high (street noise) frequencies.