probably, i’m not very familiar with RTk GPS. As ever the wiki has lots of info
In particular it says this:
The base station needs a certain amount of time to meet the accuracy requirements of your input. Testing shows that, in an open area without shelter, to achieve the absolute accuracy of 2m takes a few minutes; to reach the absolute accuracy of less than 30cm takes around an hour; to reach the accuracy of 10cm takes a few hours.
Personally RTK is not the first thing i would do, if you want to do surveys on uneven ground its not like you would get the rover to drive that accurately anyway. It really depends on you use case. For example you may not care that much that the rover is exactly on the waypoint but more that the sensor data your collecting has a accurate location stamp.
I would do some surveys your current setup first.