If you stick to the traditional definition of workamping, which is either working for the RV park you are staying or taking a position that pretty much requires you to have an RV (oil field gate guard for example), you can find positions that pay, but seldom is it enough to consider it as a replacement career (at the RV park) or a position that gives you that retirement feeling (gate guarding) since the positions are located well away from areas people associate with recreation.
People that workamp usually do it to supplement their income and to stretch their retirement income. Working for a site, for example, will really help stretch that pension and social security income, but you won't be buying a new Newell with any additional pay you might receive over and above the site.
People that make a true living while on the road usually have a portable, in demand, skill. Traveling nurse, catastrophic insurance claim adjusters and the like often travel by and live in an RV. But is that really semi-retirement, working 40 hours a week as a nurse or spending your time at the scenes of disasters?.
I.T. professionals are probably the best example of people who can earn high wages while traveling. But even then, they are often tethered either to areas with true high speed internet, or have to go to the office on occasion, which are generally located in cities, not vacation spots.
Traveling the country taking part-time jobs and living the happy go lucky lifestyle sure sounds appealing, but most often money troubles rears it ugly head and often times when people realize they are in the financial hole it is too late to climb out. (see the number of people who have given up looking for a job because they have been out of the workforce for so long. ) Employers look for fresh workers up to speed on their skills, who won't need time to get back into the race. So if you leave your job and your profession, be aware there may be no turning back.