Yes, that looks like the right material, HPBCD.

Regarding solvents used, I don't know what will or will not work outside of the 75% ethanol which worked for me. The method is based on technique N4 from the first attachment in post #23:

The way I interpret this is that you want drugs dissolved in alcohol and HPBCD in water in a miscible solution. So I think ethanol/water would be a good way to start. I did not dissolve everything separately as the text says, did all at once (extract, HPBCD and everclear). If you want to use IPA, add ~20% water to it and make sure you have enough IPA to dissolve all the salvinorin (ethanol can dissolve 1.4mg/ml and IPA 0.7mg/ml, please double check these numbers going off memory).

As far as evaporation the alternatives should work, but make sure the hot plate is not too hot and burns the powder when all the liquid is gone. I did not do vacuum evaporation but it still worked. Stirring for 24 hours may not be needed either (I've tried shaking for a few minutes and that seemed to work, but maybe stirring longer or using a magnetic stir plate for a day could give better results - I've tried a magnetic stirrer and did not notice a big difference vs. manually shaking the jar to stir.)

Good luck! Really looking forward to your results.