Day at the lake

Cade used to BEG to go swimming.  His body craved the compression of water and he would spend hours swimming and/or taking baths/showers each day. His severe anxiety and fear of being touched has prohibited that love of the pool.  Our back yard Costco pool has sat unused all summer except a few warm evenings where he has gone out after dark and swam 9-10pm.  Sunlight bothers his sensory system.  He has gone out to the lake twice this summer to swim at Grandma Diane and Grandpa Rick's house.  Yesterday was a huge success in that he stayed 4 hours!  It took an hour of pacing the dick and watching Jace and Tia jump joyously off the end with cannonball competitions before he decided to join in.
He swam for 2 hours and finished the day with a few laps around the lake with Grandpa on the SeaDoo.  First he carefully watched Tia ride then he took a spin, self talking the entire way "you'll be alright" about a hundred times in Grandpa's ear.  Rick said he was wearing ear plugs next time.  But, he enjoyed it and talked Grandpa Rick into going back out.  After a small OCD retouching incident with Grandma Diane (I held my breath he would not hit her after such a light touch of his head that she did not even notice) to get the life jacket on, he recovered and went out for another ride.  This time, Tia sat between Grandpa and Cade. He enjoyed the ride but was ready to go home, tired from all the fun in the water, waved goodbye and said "See you tomorrow"!  Was the water loving Cade back?!
Was this medication really enough to cut the edge so that he could enjoy the simple things in life again?!  My prayers may be answered.