This is a very friendly camp. I have been many times. The sites are not on the Guadalupe because the river does flood. Tent camping is on the river. What brings me back is the friendly atmosphere and exceptional "Pet Friendly" attitude. We camped here in a Travel Trailer.
Mermaid Cove is a small park way off the beaten path at the upper end of Canyon Lake, which means it is extremely quiet and peaceful. The sites are relatively level and they give you a grill to use if you don't already have one. The campground hosts are extremely friendly and helpful. They do have a very liberal pet policy (meaning that there isn't one) but for the most part campers do the right thing. Pets are not required to be on a leash unless they become a nuisance or are aggressive. We stayed here for 3 weeks but reluctantly had to move to an RV park closer to Bulverde as my commute to work made it more cost effective to change parks. We camped here in a Motorhome.
15 RV sites with more being built and 12 cabins, 2 with additions in 2007 and some rented seasonally. Sites and roads are gravel. Some sites are water & electric only and the dump station is very close to one of the cabins. If Canyon lake regains its maximum level there is a swimming hole and place to launch canoes into a creek feeding the Guadalupe River and then the lake about a mile away. Tall rigs need to carefully watch tree branches. We camped here in a Fifth Wheel.