Thank you for your email question and the complete information; appreciate the nice compliment on my book, Inside College Volleyball. I am heartened to read that you understand summer camps for recruiting purposes can perhaps be not the best choice of funds.
Yet, if a VolleyFamily does feel that going to a camp at a school which is of interest to them and (let me stress this point) the school has expressed strong interest in the PSA, then I am just glad it is your money and not mine! I still reference that this camp visit becomes a very expensive unofficial visit, and one which is not reality - College coaches and programs are on their best behavior at camp because it is business. Summer Camp is not reality; a college coach is not trying to win games at summer camp, then are just trying to cash the checks of the campers and put on a 'good show'.
All ranting over; based upon specifics of your PSA's recruiting situation, I would suggest waiting to go to camps used for recruiting, until the Junior to Senior summer. Beyond the nature of D2/NAIA's to recruit heavier during this time frame, the odds are better that the college coach will actually be there to coach your PSA after one year, than after two years.
There is so much turnover within the collegiate coach ranks, and coupled with the Athletic Director's general uninterested stance towards volleyball athletes, VolleyFamilies are making a poor wager that the coach they interact with as a Sophomore in high school will be there when their baby girl arrives onto campus as a Freshman in college.
As camps are smaller than mega volleyball tournament, and believing the college coach knows you are coming (hence, they have shown substantial interest in the PSA), then there is no need to walk around with the graduation year on the t-shirt.
Let me close with this; if a VolleyFamily (and I am not specifically referencing your family Mr. Volley Dad) has reached out to a coach/program (via email and with film) and this family knows the college coach came and viewed their PSA at a tournament/practice.........and the college coach has not expressed a sincere interest, and the VolleyFamily is still set on going to camp for recruiting - Well, please just take that $800.00 dollars and send it to me so I can use it for an airline ticket. I promise you that the pictures I send back to you from Hawaii of me surfing will bring more enjoyment to your family than the t-shirt and lack of attention your PSA will bring home from the camp!
Distilled answer - Bigger waste to go to recruiting camp summer of sophomore to junior and better to wait because the junior to senior year is when majority of your better fit schools are recruiting.