Any wireless receiver/transmitter will work better if it is higher off the ground. You may want a WiFi (802.11a/b/g/n) booster but may also want better cellular data (4G LTE) and you certainly would want a router so that multiple device can connect.
Sorry for sounding like a commercial, but the Wingard Connect 2.0 does all of the above.
I'll have to agree with the other two folks who have posted. Campground Wi-Fi is often marginal and you would be spending money to improve your connection to bad internet.
Rob
U.S. Army retired 2020 Solitude 310GK-R MORryde IS, disc brakes, solar, DP windows (Previously in a Reflection 337RLS) 2012 F350 CC DRW Lariat 6.7 Full-time since 8/2015
WiFi boosters can, in many cases, boost the signal you receive. They cannot boost the speed. (Maybe minor increase because less re-transmission of packets, but negligible.) So you will receive a better connection to slow internet speed.
Are you just wanting better reception on campground WiFi? If so, you will probably be disappointed. Boosting will usually just make you think you have service, but frustrate you with slow bandwidth.
John & Kathy 2014 Grand Design Reflection 303RLS 2014 F250 SBCC 6.2L 3.73