A 50A circuit is actually 2 120V lines so I would guess they are 25A each. If true the breakers on the campground panel box should reflect this.
If a 50A RV power cable is #6 wire then it's max load is 37A.
Typical 50A Power CordWire Gauge ChartSo powering front and rear AC units independently should be ok, just don't anyone get the idea they can take one leg of a 50A panel and power an entire coach of 2 AC units, uwave, coffee pot and the DW blow drying her hair all at the same time. I don't think that ever works . . . .
Just my 2c.
Best,
- bob