The state of Arkansas has nearly 4,000 federal campsites (NPS, USFS & COE) with 30 amp power, most with water. Water in all campgrounds. Most campgrounds are shady enough to make it a challenge to find a spot where a satellite dish can get a clear signal in the summer. Most are on lakes or rivers.
The primary kayaking location would be the NPS Buffalo Point Campground on the Buffalo National River. The sites are on the river. At last check 47 of the 76 - 50 amp with water sites were reservable at $22 per night regular price. $11 for the senior pass.