I don't think you will have any problems solo in a kayak but it all depends on water levels. Right now it's high water and (probably) no dragging bottom or having to get out and portage but it all depends on when you are going). I would check the river levels posted on the BIBE NPS website and the daily report. You will also need a river permit when you check in at Panther Junction. If you are leaving a vehicle next to the river at Santa Elena Canyon for a couple nights be careful not to leave any valuable items in sight but it's probably LESS dangerous than most areas of Dallas, Houston, or Austin but your vehicle will be the only one around in the middle of the night. I know what you mean about trying to get people to actually commit and go on this type of trip, 10 say they are interested, 5 of those 10 say they will go, but... 4 of those 5 cancel out due to wife, family, job, weather, vacation plans, in-laws, pets, etc. so at best you might get 1 to go with you but you should go anyway and go solo if necessary. The only other real choice is "don't go" which is not the right answer. Godspeed, TWWG