Looking for 2-3 night backpacking trip in SEKI

I have a guided trip around the beginning of August for 5 days. I'm coming from Texas and would like to do a smallish 2-3 night trip in the area to acclimate.

This will be my first solo trip. So just looking for something that might be like 8 miles a day or less. Something that if I do get a little sick, I have plenty of time throughout the day to rest.

Any suggestions?