I use a CB on the road, but I have two separate Uniden 436HP units that come with GPS capabilities. I have looked at the manual for your radio and I see no way to adjust the range of the radio.
So, let's focus on the various cities you mentioned.
Tulsa: On the OKWIN P25 system, Tulsa PD can be monitored, only dispatch talk groups. With respect to Tulsa SO, I am seeing only two encrypted channels. There are a variety of various EMS/Fire that are in the clear, but some are encrypted. This systems has some juicy talk groups that might be of interest such as talk groups: 1239, OSBI tactical; 1231 and 1239, Narcotics in clear. I am including these in case you get stuck in a truck stop. I don't see any Oklahoma Highway Patrol encrypted talk groups.
If you look at the following Radio Reference DB for the OKWIN P25, under the "mode" column, you will see several abbreviations. You will see these modes in other radio systems. You can go through and make notes about which ones to edit.
Oklahoma Wireless Interoperability Network (OKWIN) (P25) Trunking System, Various, Oklahoma - Scanner Frequencies
D = Phase 1 P25 in the clear;
De = Phase 1 P25, not fully encrypted;
DE = Phase I P25, fully encrypted;
T = Phase 2 P25 in the clear;
Te = Phase 2 P25, not fully encrypted;
TE = Phase 2 P25, fully encrypted.
With respect to Bixby, Glenpool, & Jenks, you have a mixed bag of encryption. This is a Phase 2 P25 system; however, it is on the Broken Arrow Regional System:
Broken Arrow Communications Regional Network Trunking System, Broken Arrow, Oklahoma - Scanner Frequencies
I already know that Phelps county (wife comes from St. James). Phelps county shows no encryption being used on the MOSWIN system.
Missouri Statewide Wireless Interoperable Network (MOSWIN) Trunking System, Statewide, Multi-State - Scanner Frequencies
I saved the worst for last. You are not going to hear much in the St. Louis area with respect to law enforcement due to full encryption on many talk groups. I see only one Phase I P25 talk group: talk group 113, St. Louis county law pursuit. However, to avoid wrecks and other road closures, there are many clear talk groups for EMG, Fire, and EMS. Sometimes, I monitor these services when LE is encrypted.
St. Louis Area Trunked Emergency Radio (SLATER) Trunking System, St Louis Metro Area, Multi-State - Scanner Frequencies
I don't know if your radio lets you hear encryption or not. My Uniden 436HP does not let me hear encrypted talk groups. Hence, I don't include them in my setup.
I hope this helps shed some light on this matter. I was operating under the assumption that you are editing through the radio. I don't know if you have reviewed the various systems I posted within the Radio Reference DB.
"Put the pedal to the metal."