Enjoy the camping vacation of a lifetime at Sun Retreats Millbrook. We offer RV sites and vacation rentals with wonderful amenities and activities within an hour's drive of downtown Chicago. Splash around in out swimming pool, enjoy a hayride, shop or get a snack in the general store, or enjoy a peaceful day at your site. Whether you are here for a weekend getaway or an extended vacation, we have a package for you.
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Offers at Sun Retreats Millbrook
FEATURED Offer
25% OFF 3 NIGHTS OR MORE*
Get instant savings and create lasting memories with Sun Outdoors. Book three nights or more at your favorite participating resort and enjoy 25% off* RV and tent sites or vacation rentals.
- Use Promo Code Click on Use Promo Code
RV SITES & VACATION RENTALS | NO ADDITIONAL EXCLUSIONS
Promo Code :25SPRING25
FEATURED Offer
Park & Play
Enjoy more savings than you expect when you take advantage of our Park & Play Program. Just park your RV once, then leave it to come back and play as often as you like.
- Use Promo Code Click on Use Promo Code
$499 | Guest must check-in/out on specified dates (35 night stay reservation). | Valid RV Sites: Standard or Premium RV sites. (4/18/2025 - 5/23/2025)
Promo Code :25PNP$599 | Guest must check-in/out on specified dates (42 night stay reservation). | Valid RV Sites: All RV sites (9/2/2025 - 10/14/2025)
Promo Code :25PNP
UP TO 30% OFF WEEKLY STAY SAVINGS
Make your long weekend getaway into a full vacation for seven nights or more and enjoy great savings (up to 30% off*) at our participating resorts. It's time to get more for less with Sun Outdoors.
- No promo code needed to book Click on No promo code needed to book
RV Sites | Stay 7 nights or more and save 10%. Vacation Rentals | Stay 7 nights or more and save 10%
Sun Military Discount
We extend our thanks to active-duty military and veterans in the U.S. and Canadian armed forces by offering 20% off select sites. Enjoy more when you spend less and take advantage of these great savings with our Sun Military Discount Program....
- Use Promo Code Click on Use Promo Code
Take 20% Off Your Stay
Promo Code :SALUTEPromo Code :SALUTE
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