mine is the bathtub . . . i tell my hubby i need to be in there for an hour, to soak, relax, unwind. sometimes it's not long enough. (due to a 5 month old baby who breastfeeds on demand and a hubby who has ADD and fails at keeping the baby content for an hour sometimes.) i cannot relax if i can hear my baby screaming.
maybe you can grab a book or whatnot and tell your hubby you are doing your weekly momma's break . . . go to the park or a nice place and unwind.
i think if you schedule you a short daily time out (or every other day time out), you'll not need to take a long retreat at a hotel. eventually, you can reduce the time needed alone to an hour or so weekly.
try to regulate so you don't get burned out

watch your stress signs
my stress signs include: cynicism, sleeping probs, and irritability.
if you see your stress signs, then it's time for you to assertively ask your hubby for your break ASAP.
(((((((hugs)))))))